Hey @it33
to 1.: assuming you mean the exact URL from the address bar at that point, I can reproduce it tomorrow in the office (working in germany (UTC+01) and currently out of office and did not take my laptop with me for a change) and post it here. If you mean a different URL, please clarify.
to 2.: Yes I can. It is a mistake I have made earlier while experimenting, but wanted to exclude that cause when trying to get a reproduceable result for the appearing error during GitLab authentication.