"Whoops, GitLab is taking too much time to respond" after upgrade

I am running Debian 10 and upgraded from 13.8.8-ce.0 to 13.12.12-ce.0. The upgrade ran successfully as far as I can tell, no error messages or anything on the screen. Everything indicated it ran fine. I then did a gitlab-ctl reconfigure and gitlab-ctl restart. Both showed no errors. I finally made sure that there was nothing pending on the upgrade by issuing “gitlab-rails runner -e production ‘puts Gitlab::BackgroundMigration.remaining’” and it returned 0.

When I attempt to browse to the site, I keep getting “gitlab-rails runner -e production ‘puts Gitlab::BackgroundMigration.remaining’” with a 502 or a 500 error message. The 500 and 502 changes upon refresh of the page. Not sure what else to do from here.

Fixed issue. I upgrade the DB using the link below and now it is back online.