[Dovecot] Error: auth(default): passwd-file ... is missing userdb info

[noracentral at gmx.net]

Hallo

Have "pop3 plain login  Error"  and need some changes somewhere...
?where?
Please see log down
nora

--- dovecot.log ---
20 14:17:23 Error: auth(default): passwd-file /etc/dovecot/passwd: User 
modernlove at verben.ch is missing userdb info
dovecot: Sep 20 14:19:16 Error: Logins with UID 0 not permitted (user 
modernlove at verben.ch)