langflow-ai/langflow
Documented errors, page 2 of 4. Back to langflow-ai/langflow
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| Empty result while ( ). | http | error | deployment, provider, adapter, http-500, empty-response, langflow |
| API key required for this project. Provide x-api-key header… | http | error | mcp, http-401, api-key, authentication, authorization |
| Created snapshot binding has non-UUID source_ref= | http | error | watsonx-orchestrate, deployments, http-500, uuid, created-tools |
| Unsupported client | exception | error | mcp, input-validation, client-config, api |
| Metadata value for ' ' exceeds characters. | validation | warning | knowledge-base, metadata, validation, http-422, limits |
| No client_id cookie found | http | error | public-flow, authentication, cookies, http-400, api |
| Could not extract class name from code | validation | error | agentic, custom-component, validation, ast, http-400 |
| OAuth authentication is not yet implemented for MCP server… | http | error | mcp, oauth, http-501, project-creation |
| Share could not be created: it may already exist or… | http | error | authz, api, shares, conflict, unique-constraint, create |
| Starter project and default project not found. Please… | http | error | http-404, flows, folders, initial-setup, database-seeding |
| Error creating graph | http | error | flow-loader, get-graph, runtime-error, http-500 |
| Invalid flow_id: not a valid UUID. | http | error | validation, uuid, assistant, http-422 |
| Job not found | http | warning | langflow, public-flow, security, http-404 |
| Cannot change folder of a flow you do not own. | http | error | authorization, ownership, http-403, folders, rbac |
| An ingestion for this connector target is already queued or… | http | warning | knowledge-base, connector-ingest, idempotency, http-409 |
| Deployment was deleted from the provider, but local cleanup… | http | error | langflow, deployments, partial-failure, idempotent-retry |
| {e} | http | error | agentic, flow-execution, custom-component, http-400 |
| Knowledge bases not found | http | warning | knowledge-base, bulk-delete, http-404, langflow |
| MCP Server disconnected, error | http | warning | mcp, sse, network, disconnect, transient |
| Metadata must be a JSON object. | validation | warning | knowledge-base, metadata, validation, json, http-422 |
| Profile picture / not found | http | warning | http-404, profile-pictures, static-assets, filesystem |
| Cannot change a2a_card_overrides of a flow you do not own. | http | error | authorization, ownership, http-403, a2a, rbac |
| git is not available; cannot check append-only invariant. | console | error | python, ci, git, migrations, tooling, environment |
| Missing required configuration for | http | error | agentic, provider, api-key, http-400, configuration |
| Uploaded file is not a valid ZIP archive | http | error | zip, upload, import, validation |
| webhook url has no host | exception | error | a2a, webhook, validation, url |
| Absolute path must be within your flows directory | http | warning | security, path-containment, validation, http-400, fs-path |
| Metadata key is invalid: must be 1- lowercase alphanumeric… | validation | warning | knowledge-base, metadata, validation, naming, http-422 |
| Error getting chunks. | http | error | knowledge-base, chunks, vector-store, http-500 |
| Not found | http | error | agentic, files, http-404, sandbox, security |
| Flow data could not be copied for snapshot. The data may be… | http | error | http-422, flow-versions, deepcopy, data-corruption |
| In-tree provider directory not found | console | error | migration, filesystem, validation, cli |
| Cannot build deployment artifact: the parent flow for… | http | warning | deployment, flow-version, http-422, data-integrity, langflow |
| Metadata value for ' ' must be a string, number, bool, or… | validation | warning | knowledge-base, metadata, validation, type-error, http-422 |
| fs_path cannot be empty | http | warning | validation, fs-path, http-400, flows |
| Flow creation failed. | http | error | database, invariant, assistant, http-500 |
| provider_data must include exactly one of 'input' or… | validation | error | pydantic, validation, watsonx, api-contract, xor-constraint |
| cannot be combined with upsert for the same id | validation | error | watsonx-orchestrate, pydantic, validation, http-422, conflict, upsert |
| webhook url must be http or https | exception | error | a2a, webhook, validation, url |
| Bundle directory already exists | console | warning | migration, idempotency, filesystem, cli |
| Database error while activating version. Please try again. | http | error | http-500, flow-versions, database, activate, infrastructure |
| No ``*.py`` files under | console | warning | migration, filesystem, validation, cli |
| Error ingesting files to knowledge base. | http | error | knowledge-base, ingestion, http-500, server-error |
| Provider ' ' is not configured. Available providers | http | error | agentic, http-400, model-provider, validation |
| Missing provider_data for | http | warning | deployment, provider, provider-data, http-422, validation, langflow |
| --migration-release must be a three-segment SemVer (e.g… | console | error | cli, semver, validation, migration |
| Checkpoint expired or not found; cannot resume this run. | http | error | hitl, checkpoint, http-404, state-management |
| Error building Component | http | error | langflow, streaming, http-500, sse |
| An error occurred during authentication | http | error | auth, login, http-500, langflow |
| error: top-level value must be an object | console | error | python, json, migrations, tooling, schema |
| The file size is too large. Please select a file smaller… | validation | warning | frontend, file-upload, configuration, i18n |
| Inputs and outputs have overlapping names | validation | error | agentic, custom-component, validation, http-400, naming |
| Gunicorn startup requires an application factory. | exception | error | startup, gunicorn, platform, linux, app-factory |
| Per-file metadata must be a JSON object keyed by filename. | validation | warning | knowledge-base, metadata, validation, json, http-422 |
| Flow not found. | http | error | http-404, ownership, assistant, flows |
| Cannot activate a version with no data | http | error | http-400, flow-versions, activate, data-integrity |
| Content type is not an image | http | error | files, images, mime-type, http-500 |
| Error serializing vertex build response | exception | error | serialization, pydantic, vertex, custom-component |
| Event polling was cancelled | http | info | http-499, polling, client-disconnect, cancellation |
| Invalid target folder | http | error | folders, http-400, ownership, templates |
| Invalid API key | http | error | a2a, auth, http-401, api-key |
| MCP Streamable HTTP transport is not initialized | http | error | mcp, http-503, startup, lifespan, streamable-http |
| Flow data could not be copied. The data may be corrupted. | http | error | http-422, flow-versions, activate, deepcopy, data-corruption |
| Invalid flow data | validation | error | frontend, flow-import, validation, json |
| Log retrieval is disabled | http | warning | logging, http-501, configuration, superuser |
| response.model_dump() | http | error | health-check, http-500, database, cache, ops |
| Cannot cancel job with status | http | warning | knowledge-base, ingestion, cancel, http-400, race-condition, langflow |
| Binary content not supported | http | warning | agentic, files, http-415, binary, content-type |
| Endpoint name must be unique | http | error | conflict, uniqueness, http-409, endpoint-name, upsert |
| Too many files detected | exception | warning | frontend, file-upload, drag-and-drop, limit, file-manager |
| File size is larger than the maximum file size | http | warning | files, upload, http-413, size-limit |
| Graph not found | http | error | langflow, cache, graph, http-404 |
| connections contains duplicate app_id values | validation | error | watsonx-orchestrate, pydantic, validation, http-422, connections, duplicates |
| permissions cannot be null; pass an empty list to clear | http | error | authz, api, roles, validation, patch |
| Error starting build process | exception | error | frontend, build, http-error, proxy, diagnostics |
| Flow is not public | http | error | public-flow, authorization, http-403, access-control, api |
| Metadata array entry under | validation | warning | knowledge-base, metadata, validation, http-422, limits |
| Project not found | http | error | mcp, http-404, project, routing, auth |
| Failed to download flows | http | error | mcp, http-500, patch, catch-all |
| An internal error occurred while creating the flow. | http | error | http-500, database, flows, logging |
| Auto login is disabled. | http | warning | auth, auto-login, http-403, configuration, langflow |
| Error processing build events | exception | error | frontend, build, streaming, http-error, proxy |
| Failed to download files | http | error | mcp, oauth, http-500, configuration |
| Unknown permission_level | http | warning | authz, api, shares, validation, enum, patch |
| Could not load flow module | http | error | agentic, flow-loader, import, http-500, python-flow |
| Invalid embedding configuration | http | error | knowledge-base, embedding, configuration, http-400 |
| Restored version contains no flow data | exception | error | mcp, install, http-500, catch-all |
| Invalid path: resolves outside allowed directory | http | error | security, symlink, path-containment, http-400, fs-path |
| class_name is a Windows-reserved device name | validation | error | validation, windows, reserved-names, user-components |
| Failed to write | validation | error | filesystem, atomic-write, retry, user-components |
| Invalid flow filename | http | warning | agentic, path-traversal, security, http-400, flow-loader |
| lfx- already referenced in ; not patching. | console | warning | migration, pyproject, idempotency, cli |
| Folder not found | http | warning | validation, folders, http-400, upsert, flows |
| Internal server error | http | error | mcp, sse, http-500, server-error, logging |
| Metadata is not valid JSON | validation | warning | knowledge-base, metadata, json, validation, http-422 |
| provider_data must include at least one add_flows or… | validation | error | watsonx-orchestrate, pydantic, validation, http-422, required-field, tools |
| credentials contains duplicate key values | validation | error | watsonx-orchestrate, pydantic, validation, http-422, credentials, duplicates |
| errors.tooManyFiles | exception | warning | frontend, file-upload, folder-picker, limit, i18n, file-manager |
| No valid MCP server found in the input. | exception | error | frontend, mcp, json, validation, config-format |
| Internal server error in Streamable HTTP transport | http | error | mcp, http-500, streamable-http, server-error, session |