I dont know what helped but seems to me that it works now.
1./usr/local/cwpsrv/var/services/roundcube replaced with previous backup - did not help
2.So replaced with the last version - updated - did not help also
3.From cwp panel email accounts section I used autologin - did not help, no email were showing
4.Loged out and reopened autologin - and emails showed up
I guess that the key of the autologin was corrupt or did not work as it should
Can send and receive emails. Thanks