Roundcube filter error on a Plesk server: File is missing, please contact server

[senthil]

Symptoms

• The following error can be seen when accessing Roundcube Webmail > Settings > Filter
  (Out of Office, or Forwarding) you get the following error

Code Select Expand

FILE NOT FOUND
The requested resource was not found!
Please contact your server-administrator.
Failed request: webmail.example.com/roundcube/?
_task=settings&_action=plugin.managesieve


• You see the following error when in /var/log/plesk-roundcube/errors:

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[01-Jul-2024 19:41:39 +0000]: <je5n10vf> PHP Error: Error
loading templatefor managesieve.managesieve in
/usr/share/psa-
roundcube/program/include/rcmail_output_html.php on line 804
(GET /roundcube/?_task=settings&_action=plugin.managesieveCause
This is due to a skin being used on webmail:

Code Select Expand

#grep skin /usr/share/psa-roundcube/config/config.inc.php |
grep config | head -n2
$config['skin'] = 'custom_skin';
Resolution

• Log in using SSH.
• Use a text editor to comment out the custom skin line on configuration file /usr/share/psa-roundcube/config/config.inc.php. The line should start with $config['skin'].