new install of 0.40 on clean Ubuntu 18 . admin seems to be working fine , however Webmail , or IMAP is not . if i try with roundcubemail :
IMAP Error in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube_imap.php (196): Login failed for firstname.lastname@example.org from xx.xx.xx.xx. LOGIN: Login failed.
i also see in roundcube/imap when debug enabled :
[18-Feb-2019 17:58:07 +0200]:  S: * OK [CAPABILITY IMAP4rev1] Courier-IMAP ready. Copyright 1998-2005 Double Precision, Inc. See COPYING for distribution information.
[18-Feb-2019 17:58:07 +0200]:  C: A0001 LOGIN ****** 
[18-Feb-2019 17:58:12 +0200]:  S: A0001 NO Login failed.
reboot doesnt help. Any help please ?