Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\EventDispatcherInterface" not found in /home/wwwarms/ws.arms-tools.com/websocket-server/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:31 Stack trace: #0 {main} thrown in /home/wwwarms/ws.arms-tools.com/websocket-server/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php on line 31