Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Extension\Extension" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\debug-bundle\DependencyInjection\DebugExtension.php:30 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\debug-bundle\DependencyInjection\DebugExtension.php on line 30