Communication problem between gitlab.ikp.kit.edu and gitlab-runners

Since yesterday there are more or less erratic failures to transfer the artifacts at the end of CI runs back to the KIT server.

"WARNING: Uploading artifacts to coordinator... failed id=1921 responseStatus=500 Internal Server Error status=500 Internal Server Error token=Nq_F_3EX"

This could be due to incompatibilities "DEPRECATION: this GitLab server doesn't support refspecs, gitlab-runner 12.0 will no longer work with this version of GitLab"

or timeouts, low space, etc.

Not clear right now.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information