Fatal error: Uncaught Error: Class "ilHtmlException" not found in /var/www/html/ilias/components/ILIAS/Html/exceptions/class.ilHtmlPurifierNotFoundException.php:25 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Html/exceptions/class.ilHtmlPurifierNotFoundException.php on line 25