Fatal error: Uncaught Error: Class 'Doctrine\ORM\Mapping\Builder\AssociationBuilder' not found in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\orm\lib\Doctrine\ORM\Mapping\Builder\OneToManyAssociationBuilder.php:30 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\orm\lib\Doctrine\ORM\Mapping\Builder\OneToManyAssociationBuilder.php on line 30