Fatal error: Uncaught Error: Class 'Twig\Extension\AbstractExtension' not found in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\doctrine-bundle\Twig\DoctrineExtension.php:15 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\InvoiceTracking\vendor\doctrine\doctrine-bundle\Twig\DoctrineExtension.php on line 15