Fatal error: Uncaught Error: Interface "Ratchet\MessageComponentInterface" not found in /users/energydata/www/volkszaehler.org/vendor/cboden/ratchet/tests/helpers/Ratchet/WebSocket/Stub/WsMessageComponentInterface.php:6 Stack trace: #0 {main} thrown in /users/energydata/www/volkszaehler.org/vendor/cboden/ratchet/tests/helpers/Ratchet/WebSocket/Stub/WsMessageComponentInterface.php on line 6