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