Hi @tukusejssirs,
In addition to iwalker’s troubleshooting steps above, can you also verify that GitLab secrets were restored on the new server?
You can use sudo gitlab-rake gitlab:doctor:secrets to check if there are any values which can’t be decrypted by the current secrets, which is usually indicative of not properly copying/restoring secrets from the old server to the new server during a GitLab instance migration.