Fatal error: Uncaught Error: Class 'Doctrine\Persistence\Mapping\Driver\FileDriver' not found in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\orm\lib\Doctrine\ORM\Mapping\Driver\YamlDriver.php:42 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\orm\lib\Doctrine\ORM\Mapping\Driver\YamlDriver.php on line 42