Fatal error: Uncaught Error: Interface "Ratchet\MessageComponentInterface" not found in /var/www/html/mun/vendor/cboden/ratchet/src/Ratchet/Server/EchoServer.php:9
Stack trace:
#0 {main}
thrown in /var/www/html/mun/vendor/cboden/ratchet/src/Ratchet/Server/EchoServer.php on line 9