Fatal error: Uncaught Error: Interface "Ratchet\Http\HttpServerInterface" not found in /var/www/html/mun/vendor/cboden/ratchet/src/Ratchet/Http/NoOpHttpServerController.php:6
Stack trace:
#0 {main}
thrown in /var/www/html/mun/vendor/cboden/ratchet/src/Ratchet/Http/NoOpHttpServerController.php on line 6