We have self managed instance of gitlab, enabled container registry by updating gitlab.rb file, with port 5050, it is an omnibus installation, and followed the instructions here

registry_external_url ‘https://xyz.com:5050’

The certificates (key and crt files are at /etc/gitlab/ssl) When I use
docker login xyz.com:5050 I can login using my credentials as well as with username and PAS
But when I try to push image I get error received unexpected HTTP status: 500 Internal Server Error
Tried from windows and linux both machines with same result.

Any help appreciated