502 Bad Gateway on redirecting to /onedrive/callback

Transloadit
1

I get 502 bad gateway after authentication with microsoft on redirect to /onedrive/callback

I run companion from docker image and I use nginx in front of companion, this is my configuration:

services:
  companion:
    image: transloadit/companion:edge
    container_name: uppy_companion
    restart: always
    ports:
      - "3020:3020"
    environment:
      COMPANION_SECRET: "super-secret"
      COMPANION_DOMAIN: "myserver:3021"
      COMPANION_PROTOCOL: "https"
      COMPANION_DATADIR: "/storage"
      COMPANION_GOOGLE_KEY: "your_google_client_id"
      COMPANION_GOOGLE_SECRET: ${GOOGLE_SECRET}
      COMPANION_ONEDRIVE_DOMAIN_VALIDATION: true
      COMPANION_ONEDRIVE_KEY: "xxx"
      COMPANION_ONEDRIVE_SECRET: ${ONEDRIVE_SECRET}
      COMPANION_CLIENT_ORIGINS: "https://frontend_server:3003"
      COMPANION_OAUTH_DOMAIN: "myserver:3021"

    volumes:
      - ./storage:/storage

I see that in the past this has been an issue, I can’t figure out why it happens.

If this can help as a clue, also in docker logs I get:

uppy_companion  | companion: 2025-10-02T11:29:11.503Z [debug] null Generating auth token for provider onedrive. refreshToken: yes
uppy_companion  | ::ffff:192.168.64.1 - - [02/Oct/2025:11:29:11 +0000] "GET /onedrive/callback HTTP/1.1" 302 7455 "https://login.microsoftonline.com/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36"

Which comes from /packages/@uppy/companion/src/server/controllers/callback.js file:

  logger.debug(
    `Generating auth token for provider ${providerName}. refreshToken ${refreshToken ? 'yes' : 'no'}`,
    null,
    req.id,
  )

I suppose req.id should be visible on debug log, when I tried to use version 4.7 it was visible.