ErrLookup › HumanSignal/label-studio

HumanSignal/label-studio

Label Studio is a multi-type data labeling and annotation tool with standardized output format · TypeScript · 1,869 source files

Analyzed at 0b49e9b539 on 2026-08-29. 198 documented errors.

Code / Message	Type	Severity	Tags
When "FEATURE_FLAGS_FROM_FILE" is set, you have to specify a	exception	error	configuration, environment-variables, feature-flags, startup
Validation failed on {}: {}	validation	error	validation, label-config, jsonschema
Label config contains non-unique names:	validation	error	validation, label-config, xml
toName="{toName}" not found in names: {sorted(names)}	validation	error	validation, label-config, xml
LABEL_STUDIO_HOST must be a subpath if DOMAIN_FROM_REQUEST i	exception	error	configuration, django, improperlyconfigured, deployment
SECURE_PROXY_SSL_HEADER must be configured as "<header>,<val	exception	error	configuration, django, ssl, environment-variables
Can't resolve hostname {domain}	exception	error	network, dns, ssrf, validation
URL resolves to a reserved network address (block: {subnet})	exception	warning	network, security, ssrf, ip-address
Incorrect bool value "{value}". It should be one of [1, 0, t	validation	error	validation, parameters, boolean, request
Incorrect value in key "{key}" = "{value}". It should be dig	validation	error	validation, parameters, integer, request
Incorrect value type in key "{key}" = "{value}". It should b	validation	error	request-validation, django, parameter-type, validation
Incorrect value type in key "{key}" = "{value}". It should b	validation	error	request-validation, django, parameter-type, validation
Environment variable {key} must be an integer, got: {value}	exception	error	environment-variables, configuration, integer-parsing, startup
Directory indexes are not allowed here.	http	error	http-404, static-files, django, security
“%(path)s” does not exist	http	error	http-404, static-files, django, missing-asset, deployment
{export_type} format is not converted yet	http	error	data-export, async-job, http-404, race-condition
No converted file found, probably there are no annotations i	validation	warning	data-export, empty-dataset, async-job, validation
Conversion to {export_type} already started	validation	warning	data-export, duplicate-request, idempotency, async-job
Prediction validation failed ({len(validation_errors)} error	validation	error	django, rest-framework, import, predictions, validation
"url" is not found in request data	validation	error	django, rest-framework, import, url, request-validation
"url" must be 2048 characters or fewer	validation	error	django, rest-framework, import, url, validation
load_tasks: No data found in DATA or in FILES	validation	error	django, rest-framework, import, request-body, content-type
{item} contains invalid "task" field: task ID {task_id} not	validation	error	django, rest-framework, predictions, foreign-key, validation
batch_validation_errors	validation	error	django, rest-framework, predictions, batch, validation
{item} contains invalid "task" field: corresponding task ID	validation	error	django, rest-framework, predictions, foreign-key, legacy
validation_errors	validation	error	django, rest-framework, predictions, validation, feature-flag
"file_upload_ids" parameter must be a list of integers	exception	error	django, rest-framework, delete, type-error, api
preannotated_fields	validation	error	django, rest-framework, pre-annotations, import, validation
Task item should be dict	validation	error	json, validation, data-import
Unsupported or invalid JSON structure	validation	error	json, validation, streaming, data-import
Failed to parse JSON file {self.file_name}: {extract_message	validation	error	json, parsing, streaming, data-import
Your label config has more than one data key and direct file	validation	error	label-config, data-import, validation
Failed to parse input file {self.file_name}: {extract_messag	validation	error	parsing, data-import, file-upload
_old_vs_new_data_keys_inconsistency_message(new_data_fields,	validation	error	data-import, schema-mismatch, reimport
Maximum task number is {settings.TASKS_MAX_NUMBER}, current	validation	error	django, validation, import-limit, label-studio
Maximum total size of all files is {settings.TASKS_MAX_FILE_	validation	error	django, validation, file-size-limit, label-studio
{ext} extension is not supported	validation	error	django, validation, file-extension, label-studio
extract_message(e)	validation	error	django, validation, network, error-wrapping, label-studio
load_tasks: Data root must be list	validation	error	django, validation, json-shape, import-format, label-studio
load_tasks: No tasks added	validation	error	django, validation, empty-input, import-format, label-studio
"url" is not found in request data	validation	error	validation, http, form-data, label-studio
"url" must be 2048 characters or fewer	validation	error	validation, limits, url, label-studio
load_tasks: No data found in DATA or in FILES	validation	error	validation, content-type, http, label-studio
Can't find '{action_id}' in registered actions	validation	error	validation, data-manager, actions, label-studio
Action is not allowed for the current user: {action_id}	validation	error	permissions, authorization, data-manager, label-studio
Choose a supported column type.	validation	error	django, validation, data-manager, columns
Select an existing column or enter a new column name.	validation	error	django, validation, data-manager, columns
Column name cannot contain {UNQUERYABLE_COLUMN_NAME_CHARACTE	validation	error	django, validation, data-manager, columns, naming
Enter a valid {value_type.lower()} value.	validation	error	django, validation, data-manager, columns, type-coercion
Add or Update Columns is not enabled for this organization.	validation	error	permissions, feature-flag, data-manager, entitlement
Expression must use the form command(arguments).	validation	error	django, validation, data-manager, expression
Expression command is required.	validation	error	django, validation, data-manager, expression
range(start:int) requires one start argument.	validation	error	django, validation, data-manager, expression, arguments
sample() does not accept arguments.	validation	error	label-studio, data-manager, validation, api
random(min, max) requires two arguments.	validation	error	label-studio, data-manager, validation, api
choices(values:list, weights:list) requires one or two argum	validation	error	label-studio, data-manager, validation, api
replace(old_value, new_value) requires two arguments.	validation	error	label-studio, data-manager, validation, api
Undefined expression, you can use: {add_data_field_examples}	validation	error	label-studio, data-manager, validation, api
Source annotation {source_annotation_id} not found in the cu	validation	error	label-studio, data-manager, not-found, api
Wrong old label name, it is not from labeling config: {old_l	validation	error	label-studio, validation, labeling-config, api
There are no tasks for {request.user}	http	warning	label-studio, data-manager, not-found, queue
Remove duplicates failed, operation is not finished: queryse	validation	error	label-studio, data-manager, race-condition, validation
Project and View mismatch	validation	error	api, data-manager, parameter-validation, label-studio
selectedItems must be JSON encoded string for dict: {"all":	validation	error	api, json, data-manager, request-format
selectedItems must be dict: {"all": [true\|false], "excluded	validation	error	api, data-manager, request-format, type-error
List-valued user filters support only these operators: {allo	validation	error	validation, filters, operators, django
User filter "{field_name}" does not support operator "{opera	validation	error	validation, filters, operators, django
`is any of` / `is none of` support Task ID, Inner ID, annota	validation	error	validation, filters, operators, data-manager
Filter value must be a list for `is any of` / `is none of`.	validation	error	validation, filters, type-error, data-manager
User filter list exceeds maximum size of {settings.DATA_MANA	validation	error	validation, limits, filters, configuration
User filter values must be integer ids.	validation	error	validation, filters, type-error, integer-parsing
Cannot filter on column "{_filter.filter.removeprefix('filte	validation	error	validation, filters, django, orm, column-names
Not supported filter type	validation	error	django, validation, data-manager, filters
Child filters cannot contain nested child filters	validation	error	pydantic, validation, data-manager, filters
LOCK_PERMISSION_MESSAGE	validation	error	django, permissions, rest-framework, data-manager
Invalid entity name: {entity_name}	validation	error	django, fsm, configuration, api
transition_name: Unknown transition for this entity	validation	error	django, fsm, validation, api
transition_name: Transition is auto-triggered and cannot be	validation	error	api, validation, fsm, transition
detail: {pydantic validation message}	validation	error	pydantic, validation, api, fsm
detail: {transition validation message}	validation	error	validation, fsm, transition, api
FSMStateField is read-only. Use transitions to change state.	exception	error	serializer, django, drf, read-only, fsm
No state model found for {entity._meta.model_name} when gett	exception	error	fsm, registry, state-manager, django
Error getting current state: {e}	exception	error	database, state-manager, fsm, wrapped-error
No state model found for {entity._meta.model_name} when gett	exception	error	fsm, registry, state-manager, django
No state model found for {entity._meta.model_name} when tran	exception	error	fsm, state-manager, registry, django
Failed to transition state: {e}	exception	error	database, state-manager, fsm, concurrency, wrapped-error
No state model registered for {entity._meta.model_name} when	exception	error	fsm, registry, state-manager, api
No state model registered for {entity._meta.model_name} when	exception	error	fsm, state-management, configuration
Transition '{transition_name}' not found for entity '{entity	exception	error	fsm, transition, registry
No state model registered for entity '{entity_name}'	exception	error	fsm, state-management, registry
Failed to create state record for {transition_name}	exception	error	fsm, transition, persistence
Failed to create {transition_class.__name__}: {e}	exception	error	fsm, validation, data-mapping
Cannot start an already completed task	validation	warning	fsm, state-management, business-rules
Transition validation failed for {self.transition_name}	validation	error	fsm, validation, transition
Response is not list: {payload}	exception	warning	api, storages, response-shape
query parameter "project" is required	validation	error	api, validation, query-parameters
You do not have permission to create storages for this proje	http	error	permissions, drf, authorization, storage
{underlying connection validation error}	validation	error	cloud-storage, validation, connection, aws, azure, gcp
Failed to list storage files	validation	error	cloud-storage, network, timeout, storage, api
"form_layout.yml" is not found for {self.__class__.__name__}	http	warning	configuration, missing-file, yaml, ui, storage
Azure account name and key must be set using environment var	exception	error	azure, configuration, env-vars, credentials, storage
Container not found: {self.container}	exception	error	azure, cloud-storage, not-found, validation, container
{self.url_scheme}://{self.container}/{self.prefix} not found	exception	error	azure, cloud-storage, not-found, prefix, validation
{connection validation error}	validation	error	azure, cloud-storage, validation, credentials, serializer
Azure account name and key must be set using environment var	exception	error	azure, configuration, environment-variables, storage
Storage status ({self.status}) must be QUEUED to move it IN_	exception	error	state-machine, storage, synchronization, concurrency
validate_connection is not implemented	exception	error	not-implemented, storage, subclassing, abstract-method
NotImplementedError	exception	error	not-implemented, storage, subclassing, abstract-method
Task is required to resolve URI={uri}	exception	error	storage, uri-resolution, missing-argument
Task is required to resolve URIs in data={data}	exception	error	storage, uri-resolution, missing-argument
If you use "predictions" field in the task, you must put "da	validation	error	validation, tasks, predictions, import
If you use "annotations" field in the task, you must put "da	validation	error	validation, tasks, annotations, import
annotation_ser.errors	validation	error	django, drf, validation, import
File "{key}" is not a JSON/JSONL/Parquet file. Only .json, .	exception	error	storage, import, file-extension, sync
Error loading JSON from file "{key}".\nIf you're trying to i	exception	error	json, storage, parsing, encoding
Export storage {self.id}: {failed} annotation(s) failed to e	exception	error	storage, export, sync, cloud
{path} {what} already exists. Use "--force" option to recrea	console	error	filesystem, cli, conflict
Invalid or missing serializer class	validation	error	api, drf, configuration, validation
PermissionDenied	http	error	permissions, api, auth, drf
Error validating storage connection	validation	error	storage, cloud, validation, connectivity
extract_message(exc)	validation	error	gcs, google-cloud, validation, drf
Google Application Credentials must be valid JSON string. {e	exception	error	gcs, google-cloud, credentials, configuration
No blobs found in {bucket_name}/{prefix} or prefix doesn't e	exception	error	gcs, storage, validation, configuration
Absolute local path "{self.path}" does not exist	validation	error	filesystem, local-storage, validation, configuration
Absolute local path "{self.path}" cannot be the same as LOCA	validation	error	security, local-storage, validation, configuration
Absolute local path "{self.path}" must be a subdirectory of	validation	error	security, local-storage, validation, configuration
Serving local files from the host filesystem can be a securi	validation	error	security, configuration, environment, local-storage
Failed to read file {path}: {str(e)}	exception	error	filesystem, io, permissions, sync
_stringify_detail(detail)	validation	error	api, serialization, validation, django
extract_message(exc)	validation	error	api, serialization, validation, django
Please explicitly pass a redis db id to prevent accidentally	exception	error	redis, configuration, missing-argument, validation
Can't connect to Redis server.	validation	error	redis, network, connection, serializer
{self.url_scheme}://{self.bucket}/{self.prefix} not found.	exception	error	s3, aws, storage, not-found
exc.kwargs['report']	validation	error	s3, aws, validation, serializer, bucket-name
Wrong credentials for S3 {bucket_name}	validation	error	s3, aws, credentials, serializer, validation
Cannot find bucket {bucket_name} in S3	validation	error	s3, aws, not-found, bucket, serializer
It seems access keys are incorrect	validation	error	s3, aws, credentials, typeerror, serializer
{storage.url_scheme}://{storage.bucket}/{storage.prefix} not	validation	error	s3, aws, not-found, prefix, serializer
Debugging info is not available for s3 endpoints on domain:	exception	warning	s3, security, endpoint, configuration, error-masking
Can't import JSON-formatted tasks from {key}. If you're tryi	exception	error	storage, json, import, label-studio
Authentication token no longer valid: legacy token authentic	http	error	auth, jwt, token, api
Invalid Label Studio token	exception	error	jwt, token, validation, auth
`token_exists` You already have a valid token. Please revoke it before creating a new one.	http	error	auth, token, api, conflict
Creating labels for different projects in one request not al	validation	error	validation, labels, bulk-api, drf
Couldn't import Django. Are you sure it's installed and avai	console	critical	python, django, environment, dependency
list should not be empty	validation	error	validation, ml, drf, serializer
Value must be a list	validation	error	validation, ml, type-error, drf
All items in the list must be strings	validation	error	validation, ml, type-error, drf
You can delete members only for your current active organiza	http	error	permissions, organizations, api, drf
No memberships found for user {user}	exception	error	django, orm, user-management
Can't find Organization by welcome URL: {url}	exception	error	django, invite-link, url-parsing
Project with the same name already exists: {title}	exception	error	django, rest, duplicate, unique-constraint
Database error during project creation. Try again.	exception	critical	database, integrity-error, django, rest
Can't find Project by invite URL: {url}	exception	error	django, invite-link, url-parsing
Created annotations are incompatible with provided labeling	validation	error	label-studio, validation, labeling-config, annotations
There are {count} annotation(s) created with tag "{control_t	validation	error	label-studio, validation, labeling-config, annotations
These labels still exist in annotations or drafts:\n{diff_st	validation	error	label-studio, validation, labels, labeling-config
\n* WARNING! *\n Could not find an available port\n to l	console	error	network, port-in-use, server-startup, label-studio
This task cannot be skipped.	validation	error	validation, annotations, business-rule, label-studio
Provide --project <id> or --organization <id>	console	error	cli, django-management-command, missing-argument, label-studio
Project {project_id} not found	console	error	django, management-command, cli, not-found
No projects found for organization {organization_id}	console	error	django, management-command, cli, not-found
Invalid SkipQueue value: {self.project.skip_queue}	validation	error	django, enum, data-integrity, validation
Each item in prediction result should be dict	validation	error	prediction, validation, format, serializer
Incorrect format {type(result)} for prediction result {resul	validation	error	prediction, validation, type-error, format
Project is required for prediction validation	validation	error	serializer, prediction, validation, missing-field
Error validating prediction: {validation_errors}	validation	error	prediction, validation, custom-validator, settings
annotation "result" can't be parse from str to JSON	validation	error	annotation, json, validation, serializer
annotation "result" field in annotation must be list	validation	error	annotation, validation, serializer, format
Error validating annotation: {validation_errors}	validation	error	validation, serializer, annotations, label-studio
`required` This field is required.	validation	error	validation, required-field, serializer, drf, tasks
All tasks are empty (None)	validation	error	validation, null-payload, bulk-import, tasks
`not_a_list` not a list	validation	error	validation, type-error, bulk-import, tasks, json
`empty` empty	validation	warning	validation, empty-input, bulk-import, tasks
Can't deserialize tasks due to {errors}	validation	error	django, rest-framework, serialization, import, validation
It's expected to have 'email' field in 'completed_by' data i	validation	error	django, import, annotations, completed-by, validation
Unknown annotator's email {email}	validation	error	django, import, completed-by, organization-members, unknown-email
Import data contains completed_by={completed_by} which is no	validation	error	django, import, completed-by, validation, type-mismatch
{'predictions': prediction_errors}	validation	error	django, predictions, import, validation, label-config
Task is empty (None)	validation	error	validation, task-import, label-studio
"{data_key}" key is expected in task data	validation	error	validation, missing-key, label-config
data['{data_key}']={data_value} is of type '{type}', but the	validation	error	validation, type-mismatch, label-config
{e.detail[0]} [assume: item as is = task root with values]	validation	warning	validation, task-import, label-studio
{e.detail[0]} [assume: item["data"] = task root with values]	validation	warning	validation, task-import, label-studio
Task[{key}] must be {class_def}	validation	error	validation, type-mismatch, task-structure
Can't parse task data: {extract_message(e)}	validation	error	json-parse, database, corrupted-data
Field "data" must be string or dict, but not "{type(self.ins	validation	error	type-mismatch, database, task-structure
Task root must be dict with "data", "meta", "annotations", "	validation	error	validation, task-structure, type-mismatch
Annotation must have "result" fields	validation	error	validation, task-import, annotations, rest-api
"result" field in annotation must be list	validation	error	validation, task-import, annotations, type-mismatch
Prediction must have "result" fields	validation	error	validation, task-import, predictions, rest-api
All tasks are empty (None)	validation	error	validation, task-import, null-input, rest-api
data is not a list	validation	error	validation, task-import, type-mismatch, rest-api
data is empty	validation	error	validation, task-import, empty-input, rest-api
Can't deserialize tasks due to {errors}	validation	error	validation, task-import, batch-errors, rest-api
Cannot update read-only field: {field}	http	error	rest-api, http-405, users-api, read-only-field
Project must be an integer.	validation	error	validation, query-params, hotkeys, http-400
Project not found.	http	error	http-404, hotkeys, multi-tenancy, rest-api