Me too, with Firefox and Chrome. I’m trying to log in using an email address + password, which I think has worked in the past. I don’t get any error message, though, only the same login page again.
@Ovear, which of the login methods (FB, Github, Google, LinkedIn, MS, email+password) are you trying to use?
Oh, that’s super weird. Nothing there has changed for a while. :-/ Does it work with one of the other login types? Does it work on the production site ( https://manage.ntppool.org/ )