Fatal error: Uncaught Error: Interface "Ratchet\ConnectionInterface" not found in /lamp/www/quantix/vendor/cboden/ratchet/tests/helpers/Ratchet/Mock/Connection.php:5 Stack trace: #0 {main} thrown in /lamp/www/quantix/vendor/cboden/ratchet/tests/helpers/Ratchet/Mock/Connection.php on line 5