Fatal error: Uncaught Error: Interface "ilHtmlPurifierInterface" not found in /var/www/html/ilias/components/ILIAS/Accessibility/classes/Document/class.ilAccessibilityTrimmedDocumentPurifier.php:22 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Accessibility/classes/Document/class.ilAccessibilityTrimmedDocumentPurifier.php on line 22