502 problems after I failed backup

It keeps loading the 502 error after I failed back up on the server.

I tried to gitlab-ctl reconfigure to reconfigure the gitlab settings, but it still has the same issue.

I tried to reboot few times and start and restart the gitlab; however, it keeps loading 502 error.

So, I tried to update the Gitlab and it keeps the error regarding the exceed file size.

Is there anyway to fix it??