admin password not accepted

Unable to login using my usual credentials, was working previously.

I've tried recreating config.conf, but even the password set via that fails...

I hadn't updated source in a while so that was done last week.

Debian 11. I will add that Debian also had an update to pgsql last week, in case this might be related?

I've had a quick browse of the forums and can't see anyone having similar at the moment.

Password reset info seems old, should it still work?