Fatal error: Uncaught Error: Class "Symfony\Component\Security\Core\Exception\AuthenticationException" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\security-core\Exception\CookieTheftException.php:21 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\security-core\Exception\CookieTheftException.php on line 21