Fatal error: Uncaught Error: Interface "Symfony\Component\DependencyInjection\Extension\ExtensionInterface" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\dependency-injection\Extension\Extension.php:27 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\dependency-injection\Extension\Extension.php on line 27