Fatal error: Uncaught Error: Interface 'Ratchet\RFC6455\Messaging\DataInterface' not found in /home/soh-works/www/websoket-sample/vendor/ratchet/rfc6455/src/Messaging/MessageInterface.php:4
Stack trace:
#0 {main}
thrown in /home/soh-works/www/websoket-sample/vendor/ratchet/rfc6455/src/Messaging/MessageInterface.php on line 4