Fatal error: Uncaught Error: Class "Symfony\Component\Notifier\Exception\LogicException" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\notifier\Exception\UnsupportedSchemeException.php:20 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\notifier\Exception\UnsupportedSchemeException.php on line 20