A colleague was in Roundcube yesterday looking at their e-mails and was kicked out.
I looked at the error log for yesterday and the error says - "PHP Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /usr/local/cpanel/base/3rdparty/roundcube/program/lib/Roundcube/bootstrap.php on line 156".
I hope someone in this forum can help?
Kind Regards
The deprecated notice wouldn't be causing the user to be logged out. I see your using Roundcube through cPanel so its possible that cPanel is logging the user out.