Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /home/wwwarms/ws.arms-tools.com/websocket-server/vendor/symfony/console/Event/ConsoleEvent.php:24 Stack trace: #0 {main} thrown in /home/wwwarms/ws.arms-tools.com/websocket-server/vendor/symfony/console/Event/ConsoleEvent.php on line 24