Fatal error: Uncaught Error: Class 'Doctrine\ORM\EntityRepository' not found in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\doctrine-bundle\Repository\ServiceEntityRepository.php:23 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\doctrine-bundle\Repository\ServiceEntityRepository.php on line 23