I did commit successfully in my local repository. When I try to do:
git push https://gitlab.com/priceinsight/jmt4manager/compare/develop...2-retrieve-list-us
I understand that your answer was already solved, but I had a very similar issue myself with a nonsense URL. The actual issue for me was that I had not logged into the company internet yet, so git was being redirected somehow through some sort of internet login page, and failing to go through.
The fix in this case is simple: just login in a separate browser before trying to git push your changes.