ISPConfig and Roundcube

[Richard S. Adkins]

Dear friends,

Could you please help me to solve my issue. I have installed ISPConfig on Ubuntu and installed Roundcube as plugin, after creating mailbox user and trying to logon I ve got the error below:

IMAP Error: Authentication failed (LOGIN): "" (POST /roundcubemail/?_task=&_action=login)

Could you please help me to track that issue.