Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventSubscriberInterface' not found in D:\workspaces\liZiPingBack\vendor\symfony\framework-bundle\EventListener\SuggestMissingPackageSubscriber.php:27 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\symfony\framework-bundle\EventListener\SuggestMissingPackageSubscriber.php on line 27