Fatal error: Uncaught Error: Class "ilAbstractLearningHistoryProvider" not found in /var/www/html/ilias/components/ILIAS/Tracking/classes/learning_history/class.ilTrackingLearningHistoryProvider.php:10 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Tracking/classes/learning_history/class.ilTrackingLearningHistoryProvider.php on line 10