Fatal error: Uncaught Error: Interface "Ratchet\MessageInterface" not found in /lamp/www/quantix/vendor/cboden/ratchet/src/Ratchet/Http/HttpRequestParser.php:12 Stack trace: #0 {main} thrown in /lamp/www/quantix/vendor/cboden/ratchet/src/Ratchet/Http/HttpRequestParser.php on line 12