Fatal error: Uncaught Error: Class "ilTree" not found in /var/www/html/ilias/components/ILIAS/ScormAicc/classes/SCORM/class.ilSCORMTree.php:28 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/ScormAicc/classes/SCORM/class.ilSCORMTree.php on line 28