Fatal error: Uncaught Error: Interface "ilFileDataForumInterface" not found in /var/www/html/ilias/components/ILIAS/Forum/classes/Files/class.ilFileDataForum.php:21 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Forum/classes/Files/class.ilFileDataForum.php on line 21