Settings / Repository returns 500 server error

Description of the problem

I don't know what happen since the page is just returning:

500 Whoops, something went wrong on our end.

Which Group/Project (with full path) is experiencing the issue?

https://gitlab.com/singuerinc-works/com.singuerinc.www/settings/repository (private)

Approximate date/time when the error occurred.

Monday 24 July - 10:58 utc

Describe what you were doing right before the issue occurred.

I would like to setup "Repository mirroring" but I can't since I can not navigate to that page. All settings page except that one are working.