Fatal error: Uncaught Error: Interface "Ratchet\RFC6455\Handshake\NegotiatorInterface" not found in C:\melius\michael.douglas\web\prod\credpay\_common\classes\vendor\ratchet\rfc6455\src\Handshake\ServerNegotiator.php:10 Stack trace: #0 {main} thrown in C:\melius\michael.douglas\web\prod\credpay\_common\classes\vendor\ratchet\rfc6455\src\Handshake\ServerNegotiator.php on line 10