Whoops gitlab is taking too much time to respond (cant close a merge request)

Description of the problem

I can't load this URL to close the MR https://gitlab.com/ISITE-Software/vagrant/merge_requests/162

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

https://gitlab.com/ISITE-Software/vagrant/merge_requests/162

Approximate date/time when the error occurred.

Always, I've tried once a day for the last week. It never works.

Describe what you were doing right before the issue occurred.

Clicking the link.