Fatal error: Uncaught Error: Interface "Symfony\Component\HttpKernel\KernelInterface" not found in /home/wwwarms/ws.arms-tools.com/websocket-server/vendor/symfony/http-kernel/Kernel.php:55 Stack trace: #0 {main} thrown in /home/wwwarms/ws.arms-tools.com/websocket-server/vendor/symfony/http-kernel/Kernel.php on line 55