Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventDispatcherInterface' not found in D:\workspaces\liZiPingBack\vendor\symfony\event-dispatcher\EventDispatcher.php:33 Stack trace: #0 {main} thrown in D:\workspaces\liZiPingBack\vendor\symfony\event-dispatcher\EventDispatcher.php on line 33