Fatal error: Uncaught Error: Interface 'Symfony\Component\Config\Loader\LoaderInterface' not found in /home/soh-works/www/websoket-sample/vendor/symfony/routing/Loader/AnnotationClassLoader.php:73 Stack trace: #0 {main} thrown in /home/soh-works/www/websoket-sample/vendor/symfony/routing/Loader/AnnotationClassLoader.php on line 73