Fatal error: Uncaught Error: Class "ILIAS\BackgroundTasks\Implementation\Tasks\AbstractJob" not found in /var/www/html/ilias/components/ILIAS/Calendar/classes/BackgroundTasks/class.ilCalendarCopyFilesToTempDirectoryJob.php:36 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Calendar/classes/BackgroundTasks/class.ilCalendarCopyFilesToTempDirectoryJob.php on line 36