This is the error code from debug:
*Warning: requireonce(/var/www/vhosts/lernyx.com/httpdocs/templates/buildr/includes/less-variables.php): failed to open stream: No such file or directory in /var/www/vhosts/lernyx.com/httpdocs/plugins/system/zengridframework/zengridframework.php on line 66
Fatal error: requireonce(): Failed opening required '/var/www/vhosts/lernyx.com/httpdocs/templates/buildr/includes/less-variables.php' (includepath='.:/opt/plesk/php/7.2/share/pear') in /var/www/vhosts/lernyx.com/httpdocs/plugins/system/zengridframework/zengridframework.php on line 66*
This is in line 66:
require_once $path . '/includes/less-variables.php';
There is indeed no such file anywhere in the installation. Can I add this manually or what do I have to probably install?
I have now // commented that line out and at least I can continue to work like that, any suggestions?