GitLab CI process error


We use the web solution of gitlab to manage our Repositories.
Today we have a Repository where the gitlab ci process will now work.

We always get this error:

Created fresh repository.
++ git fetch origin --prune +refs/pipelines/143656714:refs/pipelines/143656714 
+refs/heads/stage:refs/remotes/origin/stage --depth 50
 error: RPC failed; HTTP 524 curl 22 The requested URL returned error: 524
fatal: the remote end hung up unexpectedly

That’s our first project where we got this kind of error. What do we wrong?

Thanks for your help.