http://wmj5kiicroak3dvoelipkcqobw7kwtltbqnmuv576l6x4b56b6dvmdad.onion/help/api/rest/troubleshooting.md
This problem occurs when your reverse proxy decodes characters like / , ? , and @ before passing the parameters on to GitLab. To resolve this problem, edit the configuration for your reverse proxy: In the VirtualHost section, add AllowEncodedSlashes NoDecode .