Fatal error: Uncaught Error: Class "ilAbstractLearningHistoryProvider" not found in /var/www/html/ilias/components/ILIAS/Badge/LearningHistory/classes/class.ilBadgeLearningHistoryProvider.php:19 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Badge/LearningHistory/classes/class.ilBadgeLearningHistoryProvider.php on line 19