Browsertrix Cloud - Selft hosted, unable to login

After spending many hours getting K3s to work my my Pi4, MongoDB no longer supports ARMv8. So I have tried the same setup on a cloud server and it all installed.
But when I go to login, the default username and password doesn’t work. “Incorrect password”.
I downloaded the config file and set my own but again it does not work. “Something went wrong, couldn’t sign you in”.

Any ideas?