Fatal error: Uncaught Error: Class "Symfony\Component\Security\Core\Authorization\ExpressionLanguage" not found in I:\www\frameworks\Symfony\doctrine\vendor\sensio\framework-extra-bundle\src\Security\ExpressionLanguage.php:21 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\sensio\framework-extra-bundle\src\Security\ExpressionLanguage.php on line 21