Fix Gitlab after upgrade

Job ID: 34366316

Budget: £10 – £20 GBP

Gitlab instance moved from CentOS server to Debian 11 - that worked, then tried to upgrade to latest version and now just getting a 500 error. Need Gitlab expert to fix urgently please, i.e. today Sunday 14th August. Thanks!
Related categories: System Admin Linux Nginx Debian GitLab