Fatal error: Uncaught Error: Interface "Ratchet\Wamp\WampServerInterface" not found in /users/danielstruebig/www/Dart_software/ratchet/Ratchet-master/tests/helpers/Ratchet/Mock/WampComponent.php:7 Stack trace: #0 {main} thrown in /users/danielstruebig/www/Dart_software/ratchet/Ratchet-master/tests/helpers/Ratchet/Mock/WampComponent.php on line 7