Fatal error: Uncaught Error: Interface "Symfony\Component\Notifier\Channel\ChannelPolicyInterface" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\notifier\Channel\ChannelPolicy.php:19 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\notifier\Channel\ChannelPolicy.php on line 19