Fatal error: Uncaught Error: Class "OCP\BackgroundJob\QueuedJob" not found in /var/www/html/nextcloud/apps/dav/lib/BackgroundJob/GenerateBirthdayCalendarBackgroundJob.php:16 Stack trace: #0 {main} thrown in /var/www/html/nextcloud/apps/dav/lib/BackgroundJob/GenerateBirthdayCalendarBackgroundJob.php on line 16