Fatal error: Uncaught Error: Class "OC\BackgroundJob\TimedJob" not found in /home/tremblinlu/MyNextCloud/nextcloud/lib/private/Preview/BackgroundCleanupJob.php:37 Stack trace: #0 {main} thrown in /home/tremblinlu/MyNextCloud/nextcloud/lib/private/Preview/BackgroundCleanupJob.php on line 37