502 not responding

Hi guys,

We have self hosted GitLab.

I was getting an error undefined method default_git_depth while creating a new project. After that I thought lets update, so I went to the terminal, did a backup with gitlab-rake gitlab:backup:create STRATEGY=copy and did some updates after with apt-get update && apt-get upgrade.

But now GitLab is not reachable and when I login trough terminal I see the notice *** System restart required ***.

Im not an expert on this and have no clue what to do now. Everything is up to date:
0 packages can be updated.
0 updates are security updates.

I would like to hear what I can do this fix this so we can continue.

Kind regards,
Boris Kamp