<![CDATA[A new Greenlight installation using OIDC fails to authenticate users.]]>
  • Install Greenlight and choose Allow all users on this Cloudron
  • Log into the installed Greenlight app.
  • Recognize the error - "Du kannst nicht authentifiziert werden. Bitte kontaktiere den Administrator."
    • ]]>    https://forum.cloudron.io/topic/15113/a-new-greenlight-installation-using-oidc-fails-to-authenticate-users.RSS for NodeWed, 15 Apr 2026 19:12:12 GMTTue, 24 Feb 2026 14:33:04 GMT60<![CDATA[Reply to A new Greenlight installation using OIDC fails to authenticate users. on Tue, 24 Feb 2026 17:53:38 GMT]]>Hello @luckow
    I could reproduce your issue.
    When setting LOG_LEVEL=debug in /app/data/env I was able to get this error from the web logs viewer:

    Feb 24 18:35:29 E, [2026-02-24T17:35:29.330015 #1] ERROR -- : [bc0248f3-ea20-4e4e-a461-e2d3862cb272] Error during authentication: Validation failed: Avatar width is not included between 1 and 300 pixels, Avatar height is not included between 1 and 300 pixels

    And indeed, I have a profile picture set in Cloudron. When I removed it, I was able to log in.
    An issue was created: https://github.com/bigbluebutton/greenlight/issues/6212

    ]]>    https://forum.cloudron.io/post/120690https://forum.cloudron.io/post/120690Tue, 24 Feb 2026 17:53:38 GMT