Fatal error: Uncaught Error: Class "PKP\jobs\BaseJob" not found in C:\xampp\htdocs\ojs\lib\pkp\jobs\metadata\BatchMetadataChangedJob.php:26 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ojs\lib\pkp\jobs\metadata\BatchMetadataChangedJob.php on line 26