"Application error" when using any form of authentication on services

[tealtxgr]

Describe the Bug

Hi there, I left this as a discussion but the issue is getting worse and no one has been able to get to my post unfortunately. So I'm mirroring it here, with some updates: I'm running into an issue where if I try and connect to my services I just get the following error:

Application error: a client-side exception has occurred while loading pangolin.mysite.com (see the browser console for more information).

This only happens if I have any form of Authentication enabled-- Platform SSO, Pin code, or Password enabled. If I turn those off the service is perfectly accessible. This is for multiple services too-- after I update them they sometimes just become unreachable through Pangolin if they're behind authentication. I tried clearing cookies/site data for both Pangolin and the service but it still doesn't work.

This is what shows up in the browser console:

1255-26f05d8bf86e016d.js:1 Uncaught SecurityError: Failed to execute 'replaceState' on 'History': A history state object with URL 'https://auth/resource/524c80c5-5114-4249-b310-f038c207a2c6?redirect=https%3A%2F%2Fservice.mysite.com%2F' cannot be created in a document with origin 'https://pangolin.mysite.com' and URL 'https://pangolin.mysite.com//auth/resource/524c80c5-5114-4249-b310-f038c207a2c6?redirect=https%3A%2F%2Fservice.mysite.com%2F'.
at 1255-26f05d8bf86e016d.js:1:25545
at o1 (4bd1b696-100b9d70ed4e49c1.js:1:88957)
at uv (4bd1b696-100b9d70ed4e49c1.js:1:98481)
at ug (4bd1b696-100b9d70ed4e49c1.js:1:98322)
at uv (4bd1b696-100b9d70ed4e49c1.js:1:98444)
at ug (4bd1b696-100b9d70ed4e49c1.js:1:98322)
at uv (4bd1b696-100b9d70ed4e49c1.js:1:98520)
at ug (4bd1b696-100b9d70ed4e49c1.js:1:98322)
at uv (4bd1b696-100b9d70ed4e49c1.js:1:98444)
at ug (4bd1b696-100b9d70ed4e49c1.js:1:98322)

Nothing of value shows up in the docker log for the pangolin container or any of the associated containers. I do notice that it says https://pangolin.mysite.com//auth rather than https://pangolin.mysite.com/auth-- is this normal? A possible misconfiguration?

One-by-one services are no longer working with authentication and I'm not sure what's causing it.

Environment

• OS Type & Version: (e.g., Ubuntu 22.04)
  Ubuntu 24.04 & 25.04

• Pangolin Version:
  1.12.1

• Gerbil Version:
  1.2.2

• Traefik Version:
  3.4.0

• Newt Version:
  1.6.0

• Olm Version: (if applicable)

To Reproduce

Turn on any form of authentication on services with the error showing up.

Expected Behavior

Access to service or redirect to login.