Fatal error: Uncaught Error: Class "ilXmlExporter" not found in /var/www/html/ilias/components/ILIAS/HTMLLearningModule/classes/class.ilHTMLLearningModuleExporter.php:23 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/HTMLLearningModule/classes/class.ilHTMLLearningModuleExporter.php on line 23