ErrLookup › langflow-ai/langflow
langflow-ai/langflow
Langflow is a powerful tool for building and deploying AI-powered agents and workflows. · Python · 3,573 source files
Analyzed at 976ec789d2 on 2026-08-14. 380 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| error: entries field must be a list | console | error | json, migration, validation, ci |
| The ' ' components moved to the 'lfx-bundles' distribution… | exception | error | import, packaging, migration, module-not-found |
| module has no attribute | exception | error | python, lazy-import, attribute-error, migration |
| Could not import from | exception | error | import, dependencies, lazy-import, packaging |
| Auth config is missing. Please check your settings and try… | validation | error | mcp, auth, configuration, project-settings, encryption |
| error: ambiguous_bare_names field must be a list | console | error | json, migration, validation, ci |
| Could not read lfx version from src/lfx/pyproject.toml | exception | error | packaging, versioning, regex, migration |
| Profile picture not found | http | warning | files, profile-pictures, path-traversal, http-404, security |
| Error ingesting via connector. | http | error | knowledge-base, ingestion, connector, http-500, langflow |
| imports from ``langflow`` -- the bundle is installed… | console | error | migration, imports, packaging, validation |
| Invalid filename | http | error | security, path-traversal, public-flow, validation, http-400 |
| err | validation | error | validation, filesystem-portability, user-components, windows |
| Task has no active stream to resubscribe to | error_code | warning | a2a, streaming, json-rpc, task-state |
| Cannot import for backwards compatibility with | exception | error | import, lfx, backwards-compat, packaging |
| : source has subdirectory/ies that move_provider does not… | console | error | migration, data-loss-prevention, packaging, cli |
| Agentic MCP server is not bound to an authenticated user | exception | critical | agentic, mcp, security, fail-closed, environment |
| Could not locate the | console | error | migration, pyproject, markers, formatting, cli |
| {**primary.to_dict(), "result": result.to_dict()} | http | error | extensions, lfx, http-422, validation |
| Could not strip ruff per-file-ignore entry for | console | error | migration, ruff, pyproject, regex, formatting |
| Cannot resolve provider snapshot ids for flow_version_ids… | http | error | watsonx-orchestrate, deployments, http-422, flow-version, snapshot-id |
| Could not create default folder. | exception | error | cli, superuser, database, first-run, folders |
| str(exc) | error_code | error | a2a, ssrf, webhook, json-rpc |
| str(e) | http | error | api-key, http-403, permissions, rbac |
| Could not determine Windows Claude config path in WSL | exception | error | mcp, wsl, subprocess, claude-desktop, interop |
| Missing deployment name while shaping wxO deployment… | http | error | watsonx-orchestrate, deployments, http-500, invariant |
| The integration is not configured for . | http | error | deployment, provider, adapter, http-500, configuration, langflow |
| webhook url resolves to a blocked address | exception | error | a2a, ssrf, webhook, security |
| Invalid flow filename | http | warning | agentic, path-traversal, security, http-400, flow-loader |
| Created snapshot binding has empty tool_id= | http | error | watsonx-orchestrate, deployments, http-500, adapter, created-tools |
| Refusing to start with | exception | critical | startup, workers, job-queue, redis, configuration |
| Could not find valid Windows user directory in WSL | exception | error | mcp, wsl, claude-desktop, filesystem, path-resolution |
| must not reference connections app_ids | validation | error | watsonx-orchestrate, pydantic, validation, http-422, connections, app-ids |
| --bundle is not a valid bundle name (lowercase snake_case… | console | error | cli, validation, naming, migration |
| name cannot be null | http | error | authz, api, roles, validation, patch |
| Unsupported operating system for Claude configuration | exception | warning | mcp, platform-support, claude-desktop, linux |
| A2A access is disabled for this agent: unsupported folder… | http | error | a2a, auth, http-403, folder |
| A deactivated duplicate exists at | console | error | migration, duplicate, validation, cli |
| Error listing metadata keys. | http | error | knowledge-base, metadata, vector-store, http-500 |
| API key required | http | error | a2a, auth, http-401, api-key |
| Flow not found | http | error | authz, api, flows, not-found, uuid-privacy |
| Unsupported event_delivery | http | warning | event-delivery, http-400, defensive-check, build |
| This endpoint is not available | http | error | agentic, http-404, feature-flag, security, configuration |
| Only the resource owner or a superuser may administer… | http | error | authz, api, shares, forbidden, oss-floor, ownership |
| Could not activate version — the flow was modified… | http | error | http-409, flow-versions, concurrency, activate, database |
| flow_version_id must be provided as a UUID string or UUID… | validation | error | pydantic, validation, watsonx, deployment, uuid |
| Error cancelling ingestion. | http | error | knowledge-base, cancel, http-500, catch-all, langflow |
| Unknown provider | http | error | agentic, provider, http-400, configuration |
| class_name must be a CamelCase identifier… | validation | error | validation, class-name, regex, user-components |
| provider directory not found | console | error | migration, filesystem, cli, validation |
| Settings service is already initialized. This indicates… | exception | error | startup, env-file, settings, race-condition, cli |
| Error deleting knowledge bases. | http | error | knowledge-base, bulk-delete, http-500, catch-all, langflow |
| You don't have permission to edit this flow. | http | error | authz, api, flows, forbidden, rbac |
| An internal error occurred while executing the flow. | http | error | agentic, flow-execution, http-500, internal-error |
| module ' ' has no attribute | exception | error | import, attributeerror, lfx, backwards-compat |
| Not Found | http | error | a2a, feature-flag, http-404, configuration |
| Project ID is required to start MCP server | http | error | mcp, sse, http-400, routing, internal-error |
| The integration is not configured for this operation. | http | error | deployment, provider, http-500, configuration, langflow |
| An error occurred while preparing the flow. | http | error | agentic, streaming, http-500, flow-file, io |
| Flow is not accessible | http | error | public-flow, database, data-integrity, http-403 |
| webhook url is not allowed | exception | error | a2a, ssrf, webhook, allowlist |
| Knowledge base missing embedding configuration. Please… | http | error | knowledge-base, embedding, metadata, http-400 |
| webhook url has an invalid host | exception | error | a2a, webhook, idna, url |
| HTTP error! status | http | error | mcp, http-500, auth-settings, pydantic |
| No model provider is configured. Please configure at least… | http | error | agentic, http-400, model-provider, api-key, configuration |
| Project owner not found | http | error | mcp, http-404, oauth, data-integrity, project-owner |
| Cannot resolve provider snapshot ids for flow_version_ids… | http | error | watsonx-orchestrate, deployments, http-422, snapshot-id, flow-version |
| {str(e)} | http | error | files, storage, http-500, upload, disk |
| Per-file metadata for | validation | error | validation, metadata, knowledge-base, http-422 |
| Per-file metadata keys must be non-empty filename strings. | validation | warning | knowledge-base, metadata, validation, http-422 |
| Cannot use deployment_provider_id: the wxo_deployments… | http | error | http-400, feature-flags, deployments, flow-versions, configuration |
| An internal error occurred while listing flows. | http | error | http-500, flows, authorization, error-handling, database |
| connections contains app_id values not referenced by… | validation | error | watsonx-orchestrate, pydantic, validation, http-422, connections, referential-integrity |
| Invalid path | http | error | agentic, files, http-400, path-traversal, validation |
| Missing superuser username in auth settings | http | error | mcp, http-400, configuration, superuser, auto-login |
| This project is configured for OAuth authentication, but… | http | error | mcp, http-401, oauth, api-key, authentication |
| File exceeds the maximum upload size of MB | http | error | upload, file-size, knowledge-base, http-413 |
| Provider account is already tracked by user. | http | error | langflow, deployments, conflict, http-409 |
| Error listing knowledge bases. | http | error | knowledge-base, list, http-500, server-error |
| Error loading flow module | http | error | agentic, flow-loader, import, http-500, python-flow, dependencies |
| String must not be empty. | validation | error | watsonx-orchestrate, pydantic, validation, http-422, empty-string |
| Unexpected result while | http | error | deployment, provider, adapter, pydantic, http-500, langflow |
| Direct-uvicorn startup (Windows/macOS) requires a pre-built… | exception | error | startup, uvicorn, platform, windows, macos |
| flow_version_id must be a valid UUID. | validation | error | pydantic, validation, watsonx, uuid, bad-request |
| Metadata key ' ' is reserved for ingestion-internal use. | validation | warning | knowledge-base, metadata, validation, reserved-words, http-422 |
| parse_exception(exc) | http | error | component, build, http-500, runtime-error |
| destination already exists (already consolidated?) | console | warning | migration, idempotency, filesystem, cli |
| Folder must be one of | http | warning | files, profile-pictures, http-400, validation |
| Error deleting knowledge base. | http | error | knowledge-base, delete, database, http-500, langflow |
| Failed to write flow to filesystem | http | error | filesystem, io, http-500, fs-path, permissions |
| existing_agent_id is only for tracking existing wxO agents… | validation | error | watsonx-orchestrate, pydantic, validation, http-422, existing-agent, payload-contract |
| Extension not found for file | http | error | files, download, filename, http-500 |
| orjson is required for --update-index (same dep… | console | error | migration, dependencies, cli, uv |
| Job not found | http | warning | langflow, job-queue, http-404, redis |
| No ingestion job found for the knowledge base | http | warning | knowledge-base, ingestion, cancel, http-404, langflow |
| Ingestion run not found. | http | warning | knowledge-base, ingestion-run, http-404, langflow |
| Name conflict — another role already uses this name | http | error | authz, api, roles, conflict, unique-constraint |
| An error occurred while executing the flow. | http | error | agentic, flow-execution, http-500, valueerror, logging |
| This flow cannot be executed. | http | error | langflow, public-flow, custom-components, http-400 |
| Flow version ' ' cannot be used as a deployment artifact | http | warning | deployment, flow-version, pydantic, http-422, langflow |
| ripgrep (rg) is required for --rewrite-consumers but was… | console | error | tooling, ripgrep, cli, dependencies |