Gitlab 500 error when accessing website

My server was restarted last night, and this morning I cannot communicate with git through the client terminal, or through a web browser. When accessing the gitlab web app, I am presented with the following:

I have inherited this server from a previous user, and would appreciate a push in the right direction to figuring this out. I cannot seem to find where server errors are being logged.

The gitlab version that is running on this server is 1.7.9.

Thank you.