After a server reset I tried to log in again, but getting this message:
The game server that you are connecting to was unable to verify your password. The game server opted to not allow players to join unless their password can be verified.
It happened around today, 12:00 gmt.
I can log into the other Copap servers without problem.
Requires at least a restart of the server instance, in some cases the entire server computer. This tends to happen when the server is restarted whenever the master server happens to be down, or at least flakey.