Fatal error: Uncaught Error: Class "ilPlugin" not found in /var/www/html/ilias/components/ILIAS/AdvancedMetaData/classes/class.ilAdvancedMDClaimingPlugin.php:12 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/AdvancedMetaData/classes/class.ilAdvancedMDClaimingPlugin.php on line 12