Fatal error: Uncaught Error: Class "ilPlugin" not found in /var/www/html/ilias/components/ILIAS/DataCollection/classes/Fields/Plugin/class.ilDclFieldTypePlugin.php:21 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/DataCollection/classes/Fields/Plugin/class.ilDclFieldTypePlugin.php on line 21