[BlueOnyx:21081] Roundcube not working - login rejected

[Adam Lepp]

A client notified me that she wasn't able to log into Roundcube.
I duplicated the problem with my own email, and some of my clients'
accounts.
I successfully used Roundcube yesterday.
Error is that the login failed.  Thankfully, email itself is OK - Since I
mostly use Outlook I wasn't aware of the issue until my client called.
For now I am having her use mail2web.com.
I noticed some posts about dovecot and IMAP - could this be a related
problem?

Today's YUM log:
Jun 07 06:00:51 Updated: 2:dovecot-2.2.30.1-BX01.el7.x86_64
Jun 07 06:00:34 Installed: clucene-core-2.3.3.4-11.el7.x86_64

Server is a 5209R with Virtbiz.