Failed to load plugin rcguard

    - IMSCP: 1.4.3
    - Distribution: Debian 8.6
    - Proftpd
    - PHP FCGID
    - MariaDB 10.0
    - Courier
    - Roundcube
    - Pydio
    - Plugins:
    PanelRedirect 1.1.5, PMA Captcha 1.1.1, RoundCubePlugins 2.0.1, SpamAssassin 1.1.1 , LetsEncrypt 3.0.0


    I see many failed to load rcguard errors, I have disabled the rcguard for now.

    Code
    1. /var/www/imscp/gui/public/tools/webmail/logs/errors
    4. [16-May-2017 10:42:55 +0200]: PHP Error: Failed to load plugin file /var/www/imscp/gui/public/tools/webmail/plugins/rcguard/rcguard.php in /var/www/imscp/gui/public/tools/webmail/program/lib/Roundcube/rcube_plugin_api.php on line 173 (POST /webmail/?_task=mail&_action=refresh)