ErrLookup › dotnet/aspnetcore
dotnet/aspnetcore
ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux. · C# · 7,070 source files
Analyzed at 294cab2f9b on 2026-08-06. 309 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| Cannot connect component ${this.localName} to the document a | exception | error | blazor-custom-elements, lifecycle, dom, custom-element |
| Invalid boolean value '${attributeValue}' for parameter '${p | validation | error | blazor-custom-elements, type-coercion, attributes, validation |
| Invalid number value '${attributeValue}' for parameter '${pa | validation | error | blazor-custom-elements, type-coercion, attributes, validation |
| The parameter '${parameterName}' accepts a complex-typed obj | validation | error | blazor-custom-elements, type-coercion, attributes, complex-types |
| Unknown type '${type}' for parameter '${parameterName}' | validation | error | blazor-custom-elements, registration, type-coercion, version-mismatch |
| Circuit options have already been configured. | exception | error | blazor-server, startup, configuration, singleton |
| Blazor Server has already started. | exception | error | blazor-server, startup, circuit, singleton |
| Cannot start the circuit until Blazor Server has started. | exception | error | blazor-server, startup, circuit, ordering |
| Blazor has already started. | exception | error | blazor-server, startup, singleton, autostart |
| Blazor has already started. | exception | error | blazor-web, startup, singleton, autostart |
| WebAssembly options have already been configured. | exception | error | blazor-webassembly, startup, configuration, singleton |
| Blazor WebAssembly has already started. | exception | error | blazor-webassembly, startup, singleton, autostart |
| Failed to start platform. Reason: ${ex} | exception | critical | blazor-webassembly, startup, runtime, network, csp |
| Blazor WebAssembly has not started. | exception | error | blazor-webassembly, root-components, startup, ordering |
| Blazor WebAssembly has not initialized. | exception | error | blazor-webassembly, root-components, startup, race-condition |
| Blazor has already started. | exception | error | blazor-webassembly, startup, singleton, autostart |
| Blazor has already started. | exception | error | blazor-webview, startup, singleton, autostart, maui |
| Unable to focus an SVG element that does not have a tabindex | exception | error | dom, focus, svg, accessibility |
| Unable to focus an invalid element. | exception | error | dom, focus, validation, null-safety |
| There is no file with ID ${fileId}. The file list may have c | exception | error | blazor, inputfile, interop, state |
| Cannot start a disposed circuit. | exception | critical | blazor-server, circuit, lifecycle |
| Circuit host not initialized. | exception | critical | blazor-server, circuit, signalr, state-persistence |
| Received persisted state for circuit ID '${circuitId}', but | exception | critical | blazor-server, circuit, state-persistence, signalr |
| The circuit associated with this dispatcher is no longer ava | exception | error | blazor-server, interop, lifecycle, disposed |
| Invalid sequence number or identifier '${sequenceOrIdentifie | exception | error | blazor, root-components, selector, interop |
| This browser does not support WebAssembly. | exception | critical | blazor-wasm, webassembly, browser-support, boot |
| For a ${resourceType} resource, custom loaders must supply a | validation | error | blazor-wasm, boot, loadbootresource, configuration |
| The options parameter is required. | validation | error | blazor, events, custom-event, validation |
| The event '${eventName}' is already registered. | validation | error | blazor, events, custom-event, duplicate |
| The custom event '${eventName}' cannot have the same name as | validation | error | blazor, events, custom-event, validation |
| initialParameters must be an object, even if empty. | validation | error | blazor, root-components, validation |
| Dynamic root components have already been enabled. | exception | error | blazor, root-components, multi-host, rendermode |
| Dynamic root components have not been enabled in this applic | exception | error | blazor, root-components, initialization |
| The '${beforeElementSelector}' selector is not supported. | exception | error | blazor, root-components, selector, dom |
| Could not find any element matching selector '${elementSelec | exception | error | blazor, root-components, selector, dom |
| Interop methods are already registered for renderer ${render | exception | error | blazor, renderer, interop, lifecycle |
| Interop methods are not registered for renderer ${rendererId | exception | error | blazor, renderer, interop, lifecycle, double-dispose |
| No interop methods are registered for renderer ${rendererId} | exception | error | blazor, renderer, interop, race-condition, lifecycle |
| Found malformed component comment at ${candidateStart.textCo | exception | error | blazor, ssr, markers, html-comments, serialization, middleware |
| Invalid component type '${type}'. | exception | error | blazor, ssr, markers, version-mismatch, schema, cache |
| Root components cannot be marked as interactive. The <html> | exception | error | blazor, rendermode, root-component, ssr, document, scripts |
| Could not find an end component comment for '${start}'. | exception | error | blazor, ssr, prerendering, markers, streaming, truncation, proxy |
| descriptor must be defined when using a descriptor. | exception | error | blazor, server-components, markers, serialization, validation |
| sequence must be defined when using a descriptor. | exception | error | blazor, server-components, markers, serialization, validation |
| Error parsing the sequence '${sequence}' for component '${JS | exception | error | blazor, server-components, markers, validation, type-coercion |
| assembly must be defined when using a descriptor. | exception | error | blazor, webassembly, markers, serialization, validation |
| typeName must be defined when using a descriptor. | exception | error | blazor, webassembly, markers, serialization, validation |
| Invalid end of component comment: '${json}' | exception | error | blazor, ssr, prerendering, markers, validation |
| End of component comment must have a value for the prerender | exception | error | blazor, ssr, prerendering, markers, validation |
| End of component comment prerendered property must match the | exception | error | blazor, ssr, prerendering, markers, ordering, validation |
| Cannot merge mismatching component descriptors: ${JSON.strin | exception | error | blazor, ssr, streaming, descriptors, keys, reconciliation, enhanced-nav |
| Enhanced navigation does not support making a non-GET reques | exception | error | blazor, enhanced-nav, forms, redirect, cors, external, navigation |
| Enhanced navigation does not support making a non-GET reques | exception | error | blazor, enhanced-nav, forms, non-blazor-endpoint, navigation |
| Cannot perform enhanced form submission that changes the URL | exception | error | blazor, enhanced-nav, forms, post-redirect-get, history, navigation |
| Renderer with ID '${rendererId}' is not listening for naviga | exception | error | blazor, navigation, renderer, location-changing, lifecycle |
| No enhanced programmatic navigation handler has been attache | exception | error | blazor, enhanced-nav, navigation, bundle, initialization |
| Only one interactive runtime may enable navigation intercept | exception | critical | blazor, navigation, router, rendermode, runtime-initialization |
| Descriptors must be assigned a renderer ID before getting us | exception | error | blazor, root-components, renderer, ssr, framework-internal |
| Unexpected renderer ID '${rendererId}' encountered while dis | exception | error | blazor, renderer, version-mismatch, rendermode, cache |
| Could not resolve a root component with SSR component ID '${ | exception | error | blazor, root-components, ssr, circuit, dom |
| EqualTo validator requires a non-empty "other" parameter. | exception | error | validation, blazor, forms, compare, configuration |
| FileExtensions validator requires a non-empty "extensions" p | exception | error | validation, blazor, forms, file-upload, configuration |
| Range validator requires at least one of "min" or "max" para | exception | error | validation, blazor, forms, range, configuration |
| regex validator requires a non-empty "pattern" parameter. | exception | error | validation, blazor, forms, regex, configuration |
| length/minlength/maxlength validator requires at least one o | exception | error | validation, blazor, forms, string-length, configuration |
| Failed to retrieve token, no account found. | exception | error | authentication, msal, blazor, token, auth-session |
| Scopes not granted. | exception | error | authentication, msal, oauth, consent, scopes, blazor |
| Could not load settings from '${settings.configurationEndpoi | exception | critical | authentication, oidc, blazor, configuration, network, startup |
| Please enter a username. | exception | warning | webauthn, passkey, identity, forms, sample, validation |
| Unknown action: | exception | warning | webauthn, passkey, identity, forms, sample, validation |
| Cannot create a JSObjectReference from the value '${jsObject | exception | error | jsinterop, blazor, interop, typescript, type-mismatch |
| Cannot create a JSStreamReference from the value '${streamRe | exception | error | jsinterop, blazor, interop, stream, typed-array, typescript |
| Supplied value is not a typed array or blob. | exception | error | jsinterop, blazor, interop, stream, typed-array, blob, typescript |
| Cannot create a JSStreamReference from the value '${streamRe | exception | error | jsinterop, blazor, interop, stream, typescript, edge-case |
| No call dispatcher has been set. | exception | error | jsinterop, blazor, interop, startup, runtime-initialization, race |
| There are multiple .NET runtimes present, so a default dispa | exception | error | jsinterop, blazor, interop, multi-runtime, rendermode, dispatcher |
| The current dispatcher does not support synchronous calls fr | exception | error | blazor, jsinterop, async, webassembly, server |
| For instance method calls, assemblyName should be null. Rece | exception | error | blazor, jsinterop, validation, programming-error |
| There is no pending async call with ID ${asyncCallId}. | exception | error | blazor, jsinterop, async, internal, reconnect |
| JS object instance with ID ${targetInstanceId} does not exis | exception | error | blazor, jsinterop, lifecycle, disposal, memory |
| Could not find '${identifier}' ('${key}' was undefined). | exception | error | blazor, jsinterop, identifiers, browser-api, prerender |
| The value '${identifier}' is not a function. | exception | error | blazor, jsinterop, type-mismatch, invocation |
| The property '${identifier}' is not defined or is not readab | exception | error | blazor, jsinterop, properties, descriptor, read |
| The property '${identifier}' is not writable. | exception | error | blazor, jsinterop, properties, descriptor, write, readonly |
| JS object instance with Id '${id}' does not exist. It may ha | exception | error | blazor, jsinterop, serialization, reviver, disposal, lifecycle |
| Byte array index '${index}' does not exist. | exception | error | blazor, jsinterop, bytearray, serialization, framing, internal |
| Invalid JS call result type '${resultType}'. | exception | critical | blazor, jsinterop, internal, version-mismatch, corruption |
| The server responded with status ${response.status}. | exception | error | blazor, passkeys, webauthn, http, authentication, network |
| Some passkey features are missing. Please update your browse | exception | error | blazor, passkeys, webauthn, browser-support, feature-detection |
| Unknown passkey operation '${this.attrs.operation}'. | exception | error | blazor, passkeys, configuration, attributes, validation |
| Worker .NET runtime not loaded | exception | critical | blazor, web-worker, initialization, lifecycle, race |
| Method not found: ${method} | exception | error | blazor, web-worker, jsexport, method-resolution, configuration |
| Cannot read message size. | exception | critical | signalr, messagepack, framing, binary, corruption, protocol |
| Messages bigger than 2GB are not supported. | exception | error | signalr, messagepack, framing, binary, size-limit, corruption |
| Incomplete message. | exception | error | signalr, messagepack, framing, binary, partial, transport |
| Invalid input for MessagePack hub protocol. Expected an Arra | exception | error | messagepack, validation, binary-protocol, typescript, input-validation |
| Invalid message type. | exception | error | messagepack, validation, enum, typescript, serialization |
| Invalid payload. | exception | error | messagepack, binary-protocol, corruption, parsing, network |
| Invalid payload for Close message. | exception | error | messagepack, close-message, validation, parsing, corruption |
| Invalid payload for Ping message. | exception | error | messagepack, ping-message, validation, parsing, corruption |
| Invalid payload for Invocation message. | exception | error | messagepack, invocation-message, validation, parsing, version-skew |
| Invalid payload for StreamItem message. | exception | error | messagepack, streaming, streamitem, validation, parsing |
| Invalid payload for Completion message. | exception | error | messagepack, completion-message, validation, parsing, version-skew |
| Invalid payload for Ack message. | exception | error | messagepack, ack-message, reliable, validation, parsing |
| Invalid payload for Sequence message. | exception | error | messagepack, sequence-message, reliable, validation, parsing |
| Invalid headers. | exception | error | messagepack, headers, validation, parsing, serialization |
| No usable HttpClient found. | exception | error | http-client, environment, fetch, xhr, node, polyfill |
| No method defined. | exception | error | http-client, validation, fetch, request-building |
| No url defined. | validation | error | http-client, validation, fetch, request-building, configuration |
| ${responseType} is not supported. | exception | error | http-client, validation, response-type, fetch, configuration |
| Message is incomplete. | exception | error | handshake, binary-protocol, parsing, network, messagepack |
| Expected a handshake response from the server. | exception | error | handshake, protocol-negotiation, version-skew, json, configuration |
| withCredentials option was not a 'boolean' or 'undefined' va | validation | error | configuration, typescript, validation, constructor |
| Negotiation can only be skipped when using the WebSocket tra | validation | error | configuration, transport, websocket, negotiate |
| The connection was stopped during negotiation. | exception | warning | lifecycle, race-condition, negotiate, abort |
| Detected a connection attempt to an ASP.NET SignalR Server. | exception | critical | version-mismatch, aspnet, server-compatibility, negotiate |
| Negotiate redirection limit exceeded. | exception | critical | negotiate, redirect-loop, load-balancing, server-config |
| Cannot refresh authentication before the connection is start | exception | error | authentication, lifecycle, refresh, validation |
| Unexpected status code returned from authentication refresh | exception | error | authentication, refresh, network, server-compatibility |
| Invalid authentication refresh response received: expected J | exception | error | authentication, refresh, http-client, serialization |
| 'WebSocket' is not supported in your environment. | exception | critical | transport, websocket, environment, node, polyfill |
| 'EventSource' is not supported in your environment. | exception | critical | transport, server-sent-events, environment, node, polyfill |
| Unknown transport: ${transport}. | validation | error | transport, enum, validation, internal |
| Cannot resolve '${url}'. | exception | error | url, node, environment, configuration |
| The HubConnection must be in the Disconnected or Reconnectin | exception | error | lifecycle, url, validation, state |
| The HubConnection url must be a valid url. | validation | error | url, validation, configuration |
| Cannot refresh authentication when the connection is not act | exception | error | authentication, refresh, lifecycle, state, validation |
| Authentication refresh is only supported with HTTP-based con | exception | error | authentication, refresh, transport, custom-connection |
| Authentication refreshBeforeExpirationInMilliseconds must be | validation | error | authentication, refresh, validation, configuration, constructor |
| Unknown log level: ${name} | validation | error | logging, configuration, validation, builder |
| A reconnectPolicy has already been set. | validation | error | builder, reconnect, configuration, validation |
| The 'HubConnectionBuilder.withUrl' method must be called bef | validation | error | builder, configuration, url, validation |
| Invalid input for JSON hub protocol. Expected a string. | exception | error | typescript, signalr, protocol, validation, type-mismatch |
| Invalid payload. | exception | error | typescript, signalr, protocol, validation, message-framing |
| Invalid payload for StreamItem message. | exception | error | typescript, signalr, protocol, streaming, validation |
| Invalid payload for Completion message. | exception | error | typescript, signalr, protocol, validation, message-invariant |
| Invalid SequenceId for Ack message. | exception | error | typescript, signalr, protocol, reliable-sessions, type-mismatch |
| Invalid SequenceId for Sequence message. | exception | error | typescript, signalr, protocol, reliable-sessions, type-mismatch |
| Invalid payload for Invocation message. | exception | error | typescript, signalr, protocol, validation, invocation |
| Binary protocols over XmlHttpRequest not implementing advanc | exception | error | typescript, signalr, transport, long-polling, browser-compat, binary |
| Message is incomplete. | exception | error | typescript, signalr, protocol, message-framing, transport |
| The '${name}' argument is required. | validation | error | typescript, signalr, validation, argument-validation |
| The '${name}' argument should not be empty. | validation | error | typescript, signalr, validation, argument-validation |
| Unknown ${name} value: ${val}. | validation | error | typescript, signalr, validation, argument-validation, enum |
| '%s' already has a value returning handler. Multiple return | validation | error | java, signalr, handlers, validation, registration |
| Expected either 'error' or 'result' to be provided, but not | validation | error | java, signalr, protocol, validation, message-invariant |
| Message is incomplete. | exception | error | java, signalr, protocol, message-framing, transport |
| The message type %s is not supported yet. | exception | error | java, signalr, protocol, unsupported, message-type |
| Error reading JSON. | exception | error | java, signalr, protocol, json, serialization |
| Invocation provides %d argument(s) but target expects %d. | exception | error | java, signalr, protocol, invocation, argument-binding, validation |
| A valid url is required. | validation | error | signalr, java, configuration, validation, constructor |
| Unexpected status code returned from negotiate: %d %s. | http | error | signalr, java, network, negotiate, authentication, http |
| The HubConnection url must be a valid url. | validation | error | signalr, java, configuration, validation, url |
| The HubConnection must be in the disconnected state to chang | exception | error | signalr, java, state-machine, lifecycle, url |
| Negotiation can only be skipped when using the WebSocket tra | validation | error | signalr, java, configuration, transport, negotiate, websocket |
| HubConnection trying to negotiate when not in the CONNECTING | exception | error | signalr, java, state-machine, concurrency, negotiate, internal |
| Negotiate redirection limit exceeded. | exception | error | signalr, java, network, negotiate, redirect, configuration |
| There were no compatible transports on the server. | exception | error | signalr, java, transport, negotiate, server-configuration, websocket |
| The message type %s is not supported yet. | exception | error | signalr, java, protocol, message-type, streaming, unsupported |
| The 'send' method cannot be called if the connection is not | exception | error | signalr, java, lifecycle, send, state-machine |
| The 'invoke' method cannot be called if the connection is no | exception | error | signalr, java, lifecycle, invoke, state-machine |
| The 'stream' method cannot be called if the connection is no | exception | error | signalr, java, lifecycle, stream, state-machine |
| Trying to send and message while the connection is not activ | exception | error | signalr, java, lifecycle, internal, concurrency, send |
| Invocation Id is already used | exception | error | signalr, java, internal, invocation, state-machine, concurrency |
| There are no callbacks registered for the method '%s'. | exception | error | signalr, java, handlers, argument-binding, lifecycle, protocol |
| Connection is not active. | exception | error | signalr, java, internal, state-machine, lifecycle |
| The HubConnection failed to transition from the '%s' state t | exception | error | signalr, state-machine, concurrency, java |
| A valid url is required. | validation | error | signalr, configuration, validation, java |
| Error reading NegotiateResponse | exception | error | signalr, network, negotiate, json, java |
| TypeReference must be instantiated with a type parameter suc | validation | error | signalr, generics, type-erasure, java |
| Cannot handle type class: ${type.getClass()} | exception | error | signalr, generics, reflection, java |
| MessagePack message was length %d but claimed to be length % | exception | error | signalr, messagepack, protocol, corruption |
| Error reading length header. | exception | error | signalr, messagepack, io, protocol |
| Error reading MessagePack data. | exception | error | signalr, messagepack, protocol, decoding |
| Unexpected message type: %d | exception | error | signalr, messagepack, internal, protocol |
| Error writing MessagePack data. | exception | error | signalr, messagepack, serialization, jackson |
| Invalid invocation result kind. | exception | error | signalr, messagepack, protocol, completion |
| Invocation provides %d argument(s) but target expects %d. | exception | error | signalr, messagepack, method-binding, signature |
| Extension types are not supported | exception | error | signalr, messagepack, extension, datetime |
| The length header was incomplete | exception | error | signalr, messagepack, framing, protocol |
| Messages over 2GB in size are not supported | exception | error | signalr, messagepack, size-limit, protocol |
| Cannot handle type class: {0} | exception | error | signalr, messagepack, generics, reflection |
| The required antiforgery cookie "{0}" is not present. | exception | error | antiforgery, security, csrf, aspnetcore |
| The required antiforgery form field "{0}" is not present. | exception | error | antiforgery, security, csrf, form, aspnetcore |
| The required antiforgery header value "{0}" is not present. | exception | error | antiforgery, security, csrf, header, spa, aspnetcore |
| The required antiforgery request token was not provided in e | exception | error | antiforgery, security, csrf, aspnetcore, http-request |
| Validation of the provided antiforgery token failed. The coo | exception | error | antiforgery, security, csrf, token-validation |
| The antiforgery cookie token and request token do not match. | exception | error | antiforgery, security, csrf, token-validation, data-protection |
| The provided antiforgery token was meant for user "{0}", but | exception | error | antiforgery, security, csrf, authentication, token-validation |
| The provided antiforgery token was meant for a different cla | exception | error | antiforgery, security, csrf, claims, token-validation |
| The provided antiforgery token was meant for an authenticate | exception | error | antiforgery, security, csrf, authentication, middleware-ordering |
| The provided antiforgery token failed a custom data check. | exception | error | antiforgery, security, csrf, extensibility, custom-validation |
| The antiforgery system has the configuration value {optionNa | exception | critical | antiforgery, security, ssl, https, configuration, reverse-proxy |
| The antiforgery cookie token is invalid. | validation | error | antiforgery, security, programming-error, api-misuse |
| The provided identity of type '{0}' is marked {1} = {2} but | exception | error | antiforgery, security, authentication, claims, configuration |
| The required antiforgery cookie token must be provided. | validation | error | antiforgery, security, programming-error, api-misuse, null-reference |
| The required antiforgery request token must be provided. | validation | error | antiforgery, security, programming-error, api-misuse, null-reference |
| The antiforgery token could not be decrypted. | exception | error | antiforgery, security, data-protection, encryption, serialization |
| Unable to read the antiforgery request token from the posted | exception | error | antiforgery, security, http-request, form-parsing, upload |
| The absolute expiration value must be in the future. | exception | error | caching, sqlserver, distributed-cache, configuration, expiration |
| Either absolute or sliding expiration needs to be provided. | exception | error | caching, sqlserver, distributed-cache, configuration, expiration |
| ExpiredItemsDeletionInterval cannot be less than the minimum | validation | error | caching, sqlserver, distributed-cache, configuration, startup |
| The sliding expiration value must be positive. | validation | error | caching, sqlserver, distributed-cache, configuration, startup |
| The absolute expiration value must be in the future. | validation | error | caching, redis, distributed-cache, configuration, expiration |
| Do not specify both 'Authorized' and 'ChildContent'. | exception | error | blazor, authorization, authorizeview, configuration |
| Authorization requires a cascading parameter of type Task<Au | exception | critical | blazor, authorization, authentication, cascading-parameter |
| The authorization data specifies an authentication scheme wi | exception | error | blazor, authorization, authentication-scheme, configuration |
| The type '{0}' does not have an associated TypeConverter tha | exception | error | blazor, binding, typeconverter, data-binding |
| The type '{0}' does not have an associated TypeConverter tha | exception | error | blazor, binding, typeconverter, data-binding |
| '{0}' is flagged with SingleDelivery, but the selected suppl | exception | error | blazor, cascading-parameter, framework-internal, custom-attribute |
| The parameter '{nameof(Name)}' for component '{nameof(Cascad | exception | error | blazor, cascading-value, configuration |
| The component '{nameof(CascadingValue<TValue>)}' does not ac | exception | error | blazor, cascading-value, parameter-binding |
| The value of {nameof(IsFixed)} cannot be changed dynamically | exception | error | blazor, cascading-value, lifecycle |
| Missing required parameter '{nameof(Value)}' for component ' | exception | error | blazor, cascading-value, parameter-binding |
| Cannot notify about changes because the {GetType()} is confi | exception | error | blazor, cascading-value, di, configuration |
| The component type '{componentType}' has a fixed rendermode | exception | error | blazor, rendermode, configuration |
| The component activator returned a null value for a componen | exception | error | blazor, di, component-activator, configuration |
| The type {componentType.FullName} does not implement {nameof | exception | error | blazor, di, component-activator, type-validation |
| Cannot provide a value for property '{propertyName}' on type | exception | error | blazor, di, keyed-services, injection |
| Cannot provide a value for property '{propertyName}' on type | exception | error | blazor, di, keyed-services, injection, registration |
| Cannot provide a value for property '{propertyName}' on type | exception | error | blazor, di, injection, registration |
| The current thread is not associated with the Dispatcher. Us | exception | error | blazor, threading, dispatcher, concurrency |
| {nameof(DynamicComponent)} does not accept a parameter with | exception | error | blazor, dynamic-component, parameter-binding |
| {nameof(DynamicComponent)} requires a non-null value for the | exception | error | blazor, dynamic-component, parameter-binding, null-reference |
| Invalid layout type: {layoutType.FullName} does not implemen | exception | critical | blazor, layout, component, configuration, type-validation |
| The URI '{relativeUri}' is not a relative URI. When Relative | exception | error | blazor, navigation, uri, configuration |
| The type {GetType().FullName} does not support supplying {na | exception | critical | blazor, navigation, extensibility, subclassing, version-compat |
| ' {GetType().Name}' already initialized. | exception | error | blazor, navigation, lifecycle, initialization, di |
| The URI '{uri}' is not contained by the base URI '{_baseUri} | exception | error | blazor, navigation, uri, base-path, configuration |
| An exception occurred while dispatching a location changed e | exception | error | blazor, navigation, events, exception-handling |
| To support navigation locks, {GetType().Name} must override | exception | critical | blazor, navigation, navigation-lock, extensibility, subclassing |
| To support navigation locks, {GetType().Name} must override | exception | critical | blazor, navigation, navigation-lock, extensibility, subclassing |
| ' {GetType().Name}' has not been initialized. | exception | error | blazor, navigation, initialization, lifecycle, di |
| The URI '{uri}' is not contained by the base URI '{baseUri}' | exception | error | blazor, navigation, uri, base-path, validation |
| Cannot have empty query parameter names. | exception | error | blazor, query-string, validation, navigation |
| Cannot format query parameters with values of type '{underly | exception | error | blazor, query-string, type-validation, serialization, navigation |
| Services cannot be accessed before the component is initiali | exception | error | blazor, component, di, lifecycle, initialization |
| PersistentComponentState already initialized. | exception | error | blazor, persistent-state, lifecycle, initialization, di |
| Registering a callback while persisting state is not allowed | exception | error | blazor, persistent-state, lifecycle, callbacks |
| Persisting state is only allowed during an OnPersisting call | exception | error | blazor, persistent-state, lifecycle, serialization |
| There is already a persisted object under the same key '{key | exception | error | blazor, persistent-state, duplicate-key, validation |
| Cannot update existing state: previous state has not been cl | exception | error | blazor, component-state, persistence, restore, lifecycle |
| State already initialized. | exception | error | blazor, component-state, persistence, restore, lifecycle |
| State already persisted. | exception | error | blazor, component-state, persistence, lifecycle |
| Render mode already set. | exception | error | blazor, component-state, render-mode, configuration |
| The registered callback {registration.Callback.Method.Name} | exception | error | blazor, component-state, render-mode, persistence, auto, interactivity |
| The type '{targetType.FullName}' declares a property matchin | exception | error | blazor, component-state, persistence, reflection, services, visibility |
| A public property '{propertyName}' on component type '{type. | exception | error | blazor, component-state, persistence, cascading-parameter, reflection, visibility |
| Unable to set property '{parameterName}' on object of type ' | exception | error | blazor, parameters, reflection, type-mismatch, rendering |
| Object of type '{targetType.FullName}' has a property matchi | exception | error | blazor, parameters, reflection, attributes, rendering |
| Object of type '{targetType.FullName}' does not have a prope | exception | error | blazor, parameters, typo, reflection, rendering |
| The property '{parameterName}' on component type '{targetTyp | exception | error | blazor, cascading-parameter, parameters, rendering |
| The property '{parameterName}' on component type '{targetTyp | exception | error | blazor, cascading-parameter, parameters, infrastructure, rendering |
| The property '{parameterName}' on component type '{targetTyp | exception | error | blazor, parameters, capture-unmatched, attributes, rendering |
| Multiple properties were found on component type '{targetTyp | exception | error | blazor, parameters, capture-unmatched, attributes, rendering |
| The property '{propertyInfo.Name}' on component type '{targe | exception | error | blazor, parameters, capture-unmatched, type-mismatch, rendering |
| The type '{targetType.FullName}' declares a parameter matchi | exception | error | blazor, parameters, reflection, attributes, visibility, rendering |
| The type '{targetType.FullName}' declares more than one para | exception | error | blazor, component, parameters, naming, case-insensitive |
| No renderer has been initialized. | exception | error | blazor, renderhandle, renderer, lifecycle, testing |
| The render handle is not yet assigned. | exception | error | blazor, renderhandle, dispatcher, statehaschanged, lifecycle, testing |
| The method {methodInfo} cannot be used as an event handler b | exception | error | blazor, event-handler, reflection, razor, parameters |
| The event handler parameter type {declaredType.FullName} for | exception | error | blazor, event-handler, eventargs, type-safety, razor |
| More than one sibling of component '{frame.ComponentTypeFiel | exception | error | blazor, key, diffing, component, razor, uniqueness |
| More than one sibling of element '{frame.ElementNameField}' | exception | error | blazor, key, diffing, element, razor, uniqueness |
| More than one sibling has the same key value, '{key}'. Key v | exception | error | blazor, key, diffing, rendertreebuilder, internal |
| The ComponentRenderMode field only exists on frames of type | exception | error | blazor, rendertreeframe, rendertreebuilder, internal, validation |
| Cannot supply a component of type '{componentType}' because | exception | error | blazor, rendermode, renderer, platform, configuration, interop |
| The ParameterView instance can no longer be read because it | exception | error | blazor, parameterview, async, lifecycle, setparameters |
| Valueless attributes may only be added immediately after fra | exception | error | blazor, rendertreebuilder, attributes, element, manual-render |
| The FrameType must be Attribute. | validation | error | blazor, rendertreebuilder, attributes, rendertreeframe, validation |
| No preceding attribute frame exists. | exception | error | blazor, rendertreebuilder, attributes, event-binding, manual-render |
| Incorrect frame type: '{prevFrame.FrameTypeField}' | exception | error | blazor, rendertreebuilder, attributes, event-binding, manual-render |
| The component type must implement Microsoft.AspNetCore.Compo | validation | error | blazor, rendertreebuilder, component, icomponent, type-safety |
| Cannot set a key outside the scope of a component or element | exception | error | blazor, rendertreebuilder, key, element, scope, manual-render |
| Cannot set a key on a frame of type {parentFrame.FrameTypeFi | exception | error | blazor, rendertreebuilder, key, region, frame-type, manual-render |
| Element reference captures may only be added as children of | exception | error | blazor, rendering, rendertree, element-reference, manual-renderfragment |
| Component reference captures may only be added as children o | exception | error | blazor, rendering, rendertree, component-reference, manual-renderfragment |
| There is no enclosing component frame. | exception | error | blazor, rendering, rendertree, rendermode, interactive |
| The enclosing frame is not of the required type 'Component'. | exception | error | blazor, rendering, rendertree, rendermode, interactive |
| Named events may only be added as children of frames of type | exception | error | blazor, rendering, rendertree, named-event, manual-renderfragment |
| Attributes may only be added immediately after frames of typ | exception | error | blazor, rendering, rendertree, attributes, manual-renderfragment |
| Component parameters may only be added immediately after fra | exception | error | blazor, rendering, rendertree, component-parameters, manual-renderfragment |
| The frame at index {frameIndex} is of type '{frame.FrameType | exception | error | blazor, rendering, rendertree, setattributevalue, experimental |
| Render output is invalid for component of type '{component.G | exception | critical | blazor, rendering, rendertree, unclosed-frame, render-invariant |
| The static asset '{property.Value}' is already mapped to {va | exception | error | blazor, static-assets, resourceasset, duplicate, configuration |
| The RouteView component requires a non-null value for the pa | exception | error | blazor, routing, routeview, routedata, missing-parameter |
| The value must implement IComponent. | validation | error | blazor, routing, routedata, icomponent, type-guard |
| The following routes are ambiguous: '{existingText}' in '{ex | exception | error | blazor, routing, ambiguous-routes, duplicate-route, configuration |
| The Router component requires a value for the parameter AppA | exception | error | blazor, routing, router, missing-parameter, configuration |
| The Router component requires a value for the parameter Foun | exception | error | blazor, routing, router, missing-parameter, configuration |
| Setting NotFound and NotFoundPage properties simultaneously | exception | error | blazor, routing, router, notfound, migration, configuration |
| The type {NotFoundPage.FullName} does not implement Microsof | exception | error | blazor, routing, router, notfound, icomponent, type-guard |
| The type {NotFoundPage.FullName} does not have a Microsoft.A | exception | error | blazor, routing, router, notfound, routeattribute, configuration |
| The type {context.Handler.FullName} does not implement Micro | exception | error | blazor, routing, router, icomponent, routeattribute, type-conflict |
| No component found for route '{route}'. Ensure the route mat | exception | error | blazor, routing, navigation, invalidoperationexception |
| SectionContent requires that 'SectionName' and 'SectionId' c | exception | error | blazor, sections, sectioncontent, parameters, invalidoperationexception |
| SectionContent requires a non-null value either for 'Section | exception | error | blazor, sections, sectioncontent, parameters, invalidoperationexception |
| Unknown parameter '{param.Name}' | validation | error | blazor, sections, sectioncontent, parameters, argumentexception |
| SectionOutlet requires that 'SectionName' and 'SectionId' ca | exception | error | blazor, sections, sectionoutlet, parameters, invalidoperationexception |
| SectionOutlet requires a non-null value either for 'SectionN | exception | error | blazor, sections, sectionoutlet, parameters, invalidoperationexception |
| SHA256 mismatch for {url}: expected {checksum}, got {sha256} | exception | critical | python, debian, network, checksum, integrity, install-debs, rootfs |
| Failed to download {url}, Status Code: {response.status} | exception | error | python, debian, network, http, install-debs, rootfs |
| Failed to download {url} after {max_retries} attempts. | exception | error | python, debian, network, retry, timeout, install-debs, rootfs |
| SHA256 mismatch for {path}: expected {packages_sha}, got {sh | exception | critical | python, debian, checksum, gpg, integrity, install-debs, rootfs |
| Signature verification failed: {result.stderr.decode('utf-8' | exception | critical | python, debian, gpg, signature, security, install-debs, rootfs |
| Could not find checksum for {path} in Release file. | exception | error | python, debian, release-file, checksum, gpg, install-debs, rootfs |
| Invalid Debian version format: {version} | validation | error | python, debian, versioning, parsing, install-debs, rootfs |
| Could not find 'data.tar.*' in {deb_file}. | exception | error | python, debian, deb, ar, filesystem, install-debs, rootfs |
| Unsupported compression format: {file_extension} | validation | error | python, debian, deb, compression, tarfile, install-debs, rootfs |