Plain text file upload error

[frank777777777]

What happened?

Does RAG API not support plain text? Here are the logs that I started the librechat api and tried uploading a text file in a chat. The log did not specifically say where the API error comes from, I assume its from RAG API?

Version Information

❯ docker images | grep librechat
ghcr.io/danny-avila/librechat-dev latest 830e803a40cb 15 hours ago 1.1GB
ghcr.io/danny-avila/librechat-rag-api-dev latest cef7841d6604 19 hours ago 7.87GB
ghcr.io/danny-avila/librechat-rag-api-dev-lite latest 13e75a2c0e7a 19 hours ago 1.48GB
ghcr.io/danny-avila/librechat latest 3d0aff522ece 2 days ago 1.11GB

Steps to Reproduce

1. start the service: docker compose up -d
2. go to the browser and select openai model and opens a chat.
3. tried upload a plain text file as text.
4. Got this error.

What browsers are you seeing the problem on?

Chrome

Relevant log output

> [email protected] backend
> cross-env NODE_ENV=production node api/server/index.js

{"level":"info","message":"[Optional] Redis not initialized.","timestamp":"2025-07-05T10:26:03.486Z"}
{"level":"info","message":"[Optional] IoRedis not initialized for rate limiters.","timestamp":"2025-07-05T10:26:07.409Z"}
{"level":"info","message":"Connected to MongoDB","timestamp":"2025-07-05T10:26:07.712Z"}
{"level":"info","message":"[indexSync] Starting index synchronization check...","timestamp":"2025-07-05T10:26:07.714Z"}
{"level":"debug","message":"[MEILI_SYNC:meili-index-sync] Creating initial flow state","timestamp":"2025-07-05T10:26:07.980Z"}
{"level":"info","message":"Custom config file loaded:","timestamp":"2025-07-05T10:26:08.202Z"}
{"level":"info","message":"{\n  \"version\": \"1.2.1\",\n  \"cache\": true,\n  \"interface\": {\n    \"customWelcome\": \"Welcome to io.ionnet! Enjoy your experience.\",\n    \"mcpServers\": {\n      \"placeholder\": \"MCP Servers\"\n    },\n    \"privacyPolicy\": {\n      \"externalUrl\": \"https://librechat.ai/...","timestamp":"2025-07-05T10:26:08.203Z"}
{"actions":{"allowedDomains":["swapi.dev","librechat.ai","google.com"]},"cache":true,"endpoints":{"custom":[{"apiKey":"${GROQ_API_KEY}","baseURL":"https://api.groq.com/openai/v1/","modelDisplayLabel":"groq","models":{"default":["llama3-70b-8192","llama3-8b-8192","llama2-70b-4096","mixtral-8x7b-32768","gemma-7b-it"],"fetch":false},"name":"groq","titleConvo":true,"titleModel":"mixtral-8x7b-32768"},{"apiKey":"${MISTRAL_API_KEY}","baseURL":"https://api.mistral.ai/v1","dropParams":["stop","user","frequency_penalty","presence_penalty"],"modelDisplayLabel":"Mistral","models":{"default":["mistral-tiny","mistral-small","mistral-medium"],"fetch":true},"name":"Mistral","titleConvo":true,"titleModel":"mistral-tiny"},{"apiKey":"${OPENROUTER_KEY}","baseURL":"https://openrouter.ai/api/v1","dropParams":["stop"],"modelDisplayLabel":"OpenRouter","models":{"default":["meta-llama/llama-3-70b-instruct"],"fetch":true},"name":"OpenRouter","titleConvo":true,"titleModel":"meta-llama/llama-3-70b-instruct"},{"apiKey":"dummy","baseURL":"https://api.portkey.ai/v1","forcePrompt":false,"headers":{"x-portkey-api-key":"${PORTKEY_API_KEY}","x-portkey-virtual-key":"${PORTKEY_OPENAI_VIRTUAL_KEY}"},"iconURL":"https://images.crunchbase.com/image/upload/c_pad,f_auto,q_auto:eco,dpr_1/rjqy7ghvjoiu4cd1xjbf","modelDisplayLabel":"Portkey","models":{"default":["gpt-4o-mini","gpt-4o","chatgpt-4o-latest"],"fetch":true},"name":"Portkey","summarize":false,"summaryModel":"current_model","titleConvo":true,"titleModel":"current_model"}]},"interface":{"agents":false,"bookmarks":true,"customWelcome":"Welcome to io.ionnet! Enjoy your experience.","endpointsMenu":true,"mcpServers":{"placeholder":"MCP Servers"},"modelSelect":true,"multiConvo":true,"parameters":true,"presets":true,"privacyPolicy":{"externalUrl":"https://librechat.ai/privacy-policy","openNewTab":true},"prompts":true,"sidePanel":true,"termsOfService":{"externalUrl":"https://librechat.ai/tos","modalAcceptance":true,"modalContent":"# Terms and Conditions for LibreChat\n\n*Effective Date: February 18, 2024*\n\nWelcome to LibreChat, the informational website for the open-source AI chat platform, available at https://librechat.ai. These Terms of Service (\"Terms\") govern your use of our web...","modalTitle":"Terms of Service for LibreChat","openNewTab":true}},"level":"debug","message":"Custom config:","registration":{"socialLogins":["github","google","discord","openid","facebook","apple","saml"]},"timestamp":"2025-07-05T10:26:08.208Z","version":"1.2.1"}
{"level":"debug","message":"Web search serperApiKey: Using environment variable SERPER_API_KEY with value set","timestamp":"2025-07-05T10:26:08.211Z"}
{"level":"debug","message":"Web search firecrawlApiKey: Using environment variable FIRECRAWL_API_KEY (not set in environment, user provided value)","timestamp":"2025-07-05T10:26:08.211Z"}
{"level":"debug","message":"Web search firecrawlApiUrl: Using environment variable FIRECRAWL_API_URL (not set in environment, user provided value)","timestamp":"2025-07-05T10:26:08.212Z"}
{"level":"debug","message":"Web search jinaApiKey: Using environment variable JINA_API_KEY (not set in environment, user provided value)","timestamp":"2025-07-05T10:26:08.213Z"}
{"level":"debug","message":"Web search cohereApiKey: Using environment variable COHERE_API_KEY (not set in environment, user provided value)","timestamp":"2025-07-05T10:26:08.213Z"}
{"level":"warn","message":"Default value for CREDS_KEY is being used.","timestamp":"2025-07-05T10:26:08.214Z"}
{"level":"warn","message":"Default value for CREDS_IV is being used.","timestamp":"2025-07-05T10:26:08.215Z"}
{"level":"warn","message":"Default value for JWT_SECRET is being used.","timestamp":"2025-07-05T10:26:08.216Z"}
{"level":"warn","message":"Default value for JWT_REFRESH_SECRET is being used.","timestamp":"2025-07-05T10:26:08.216Z"}
{"level":"info","message":"Please replace any default secret values.","timestamp":"2025-07-05T10:26:08.216Z"}
{"level":"info","message":"​\n\n    For your convenience, use this tool to generate your own secret values:\n    https://www.librechat.ai/toolkit/creds_generator\n\n    ​","timestamp":"2025-07-05T10:26:08.217Z"}
{"level":"warn","message":"❗❗❗\n\n      Password reset is enabled with `ALLOW_PASSWORD_RESET` but email service is not configured.\n      \n      This setup is insecure as password reset links will be issued with a recognized email.\n      \n      Please configure email service for secur...","timestamp":"2025-07-05T10:26:08.218Z"}
{"level":"info","message":"[indexSync] Messages are fully synced: 10/10","timestamp":"2025-07-05T10:26:08.244Z"}
{"level":"info","message":"[indexSync] Conversations are fully synced: 2/2","timestamp":"2025-07-05T10:26:08.259Z"}
{"level":"debug","message":"[indexSync] No sync was needed","timestamp":"2025-07-05T10:26:08.261Z"}
{"level":"info","message":"RAG API is running and reachable at http://rag_api:8000.","timestamp":"2025-07-05T10:26:08.268Z"}
{"level":"info","message":"No changes needed for 'USER' role permissions","timestamp":"2025-07-05T10:26:08.311Z"}
{"level":"info","message":"No changes needed for 'ADMIN' role permissions","timestamp":"2025-07-05T10:26:08.316Z"}
{"level":"info","message":"Turnstile is DISABLED (no siteKey provided).","timestamp":"2025-07-05T10:26:08.317Z"}
{"level":"info","message":"\nOutdated Config version: 1.2.1\nLatest version: 1.2.8\n\n      Check out the Config changelogs for the latest options and features added.\n\n      https://www.librechat.ai/changelog\n\n","timestamp":"2025-07-05T10:26:08.318Z"}
{"level":"info","message":"Server listening on all interfaces at port 3080. Use http://localhost:3080 to access it","timestamp":"2025-07-05T10:26:08.346Z"}
{"code":"ENOENT","errno":-2,"level":"error","message":"Failed to load service key from file: /app/api/data/auth.json ENOENT: no such file or directory, open '/app/api/data/auth.json'","path":"/app/api/data/auth.json","stack":"Error: ENOENT: no such file or directory, open '/app/api/data/auth.json'\n    at Object.readFileSync (node:fs:449:20)\n    at /app/packages/api/dist/index.js:1:68827\n    at Generator.next (<anonymous>)\n    at /app/packages/api/dist/index.js:1:2201\n    at ne...","syscall":"open","timestamp":"2025-07-05T10:26:29.239Z"}
{"level":"error","message":"[getUserPluginAuthValue] No plugin auth OCR_BASEURL found for user 6868950fda818147c7627090","stack":"Error: No plugin auth OCR_BASEURL found for user 6868950fda818147c7627090\n    at getUserPluginAuthValue (/app/api/server/services/PluginService.js:30:13)\n    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n    at async findAu...","timestamp":"2025-07-05T10:26:29.250Z"}
{"data":{"detail":"Invalid file format.","message":"Received file with mimetype text/plain, only application/pdf, image/.*, application/vnd.openxmlformats-officedocument.wordprocessingml.document, application/vnd.openxmlformats-officedocument.presentationml.presentation, application/epub+zip, application/d..."},"headers":{"access-control-allow-origin":"*","alt-svc":"h3=\":443\"; ma=86400","cf-cache-status":"DYNAMIC","cf-ray":"95a62a15fc312ccb-DFW","connection":"keep-alive","content-type":"application/json","date":"Sat, 05 Jul 2025 10:26:29 GMT","mistral-correlation-id":"019gfa1f-8a3a-7370-85fa-9e93db26ad9b","server":"cloudflare","set-cookie":["__cf_bm=Mu2IxVX_x6vKuAQjpsbclZW2LtipPBOYvhwdzav2LxI-1751711189-1.0.1.1-J8qJU5qzIs8KWgJuYqQA1AaZdCh11hbYUYTdISD4ewyuPWJfmt_bS0QAtnF314iQ7LqHu6NQOVcx6YP93au3OoNyGE2fqSOpBKjXErcfn4Y; path=/; expires=Sat, 05-Jul-25 10:56:29 GMT; domain=.mistral.ai; HttpOnly; Secure; SameSite=None","_cfuvid=JfGH4UnMvOJt4bhp8QxyzLfdkEOXjDtnOrRM-1751711189efe0-0.0.1.1-604800000; path=/; domain=.mistral.ai; HttpOnly; Secure; SameSite=None"],"strict-transport-security":"max-age=15552000; includeSubDomains","transfer-encoding":"chunked","x-envoy-upstream-service-time":"8","x-kong-proxy-latency":"6","x-kong-request-id":"0197da1f-8a3a-2df70-85fa-9evadsfsdafd9b","x-kong-upstream-latency":"9"},"level":"error","message":"Invalid file format. The server responded with status 422: Request failed with status code 422","stack":"AxiosError: Request failed with status code 422\n    at settle (/app/node_modules/axios/dist/node/axios.cjs:2031:12)\n    at IncomingMessage.handleStreamEnd (/app/node_modules/axios/dist/node/axios.cjs:3148:11)\n    at IncomingMessage.emit (node:events:536:3...","status":422,"timestamp":"2025-07-05T10:26:29.652Z"}
{"level":"error","message":"[/files] Error processing file: Invalid file format. The server responded with status 422: Request failed with status code 422 - Received file with mimetype text/plain, only application/pdf, image/.*, application/vnd.openxmlformats-officedocument.wordproc...","stack":"Error: Invalid file format. The server responded with status 422: Request failed with status code 422 - Received file with mimetype text/plain, only application/pdf, image/.*, application/vnd.openxmlformats-officedocument.wordprocessingml.document, applic...","timestamp":"2025-07-05T10:26:29.655Z"}

Screenshots

No response

Code of Conduct

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[danny-avila]

The RAG API does:

but are you using the "Upload as Text" option for OCR? Based off this error, as this seems to be coming from the Mistral OCR service:

{"data":{"detail":"Invalid file format.","message":"Received file with mimetype text/plain, only application/pdf, image/.*, application

The Mistral OCR service does not support plain-text files.