Fatal error: Uncaught Error: Class 'Doctrine\Persistence\Event\ManagerEventArgs' not found in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\orm\lib\Doctrine\ORM\Event\OnClassMetadataNotFoundEventArgs.php:36 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\orm\lib\Doctrine\ORM\Event\OnClassMetadataNotFoundEventArgs.php on line 36