Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventSubscriberInterface" not found in D:\Apache24\www\xygsapi\vendor\symfony\mailer\EventListener\EnvelopeListener.php:24 Stack trace: #0 {main} thrown in D:\Apache24\www\xygsapi\vendor\symfony\mailer\EventListener\EnvelopeListener.php on line 24