Fatal error: Uncaught Error: Interface "Ratchet\ComponentInterface" not found in /users/energydata/www/volkszaehler.org/vendor/cboden/ratchet/src/Ratchet/MessageComponentInterface.php:4 Stack trace: #0 {main} thrown in /users/energydata/www/volkszaehler.org/vendor/cboden/ratchet/src/Ratchet/MessageComponentInterface.php on line 4