Fatal error: Uncaught Error: Trait "Symfony\Component\Routing\Loader\Configurator\Traits\AddTrait" not found in /var/www/html/websocket/vendor/symfony/routing/Loader/Configurator/RouteConfigurator.php:19 Stack trace: #0 {main} thrown in /var/www/html/websocket/vendor/symfony/routing/Loader/Configurator/RouteConfigurator.php on line 19