Fatal error: Uncaught Error: Class 'Doctrine\Common\EventArgs' not found in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\persistence\lib\Doctrine\Persistence\Event\OnClearEventArgs.php:11 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\persistence\lib\Doctrine\Persistence\Event\OnClearEventArgs.php on line 11