Fatal error: Uncaught Error: Class "ilXmlImporter" not found in /var/www/html/ilias/components/ILIAS/LearningModule/classes/class.ilLearningModuleImporter.php:26 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/LearningModule/classes/class.ilLearningModuleImporter.php on line 26