UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3680.0 Safari/537.36

Steps to reproduce the problem:
1. open current user
2. click sign in
3. get redirected to: 404. That’s an error.The requested URL was not found on this server. That’s all we know.

What is the expected behavior?
the inability to sign in

What went wrong?
as above

Did this work before? N/A 

Chrome version: 73.0.3680.0  Channel: n/a
OS Version: 10.0
Flash Version: 

because of this we have no choice but to go back to google chrome even though we would rather use chromium