Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Compiler\MergeExtensionConfigurationPass" not found in /home/wwwarms/ws.arms-tools.com/websocket-server/vendor/symfony/http-kernel/DependencyInjection/MergeExtensionConfigurationPass.php:22 Stack trace: #0 {main} thrown in /home/wwwarms/ws.arms-tools.com/websocket-server/vendor/symfony/http-kernel/DependencyInjection/MergeExtensionConfigurationPass.php on line 22