Fatal error: Uncaught Error: Interface "ilHtmlPurifierInterface" not found in /var/www/html/ilias/components/ILIAS/Html/classes/class.ilHtmlPurifierComposite.php:25 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Html/classes/class.ilHtmlPurifierComposite.php on line 25