Fatal error: Uncaught Error: Class "ilXmlExporter" not found in /var/www/html/ilias/components/ILIAS/Survey/Export/class.ilSurveyExporter.php:26 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Survey/Export/class.ilSurveyExporter.php on line 26