Jpm sign suddenly times out

I use jpm xpi and jpm sign for a while now successfully, but since an hour it times out.
When I look at the provided URL in the error message it shows {“detail”: “Authentication credentials were not provided.”}

There were no changes to my build script, my jpm sign call still provides the api-key and api-secret

Any ideas?

A while later it worked again. Seems the signing server itself had a problem.