Fatal error: Uncaught Error: Interface "WSSC\Contracts\WebSocketContract" not found in C:\xampp\htdocs\cms-propay\vendor\arthurkushman\php-wss\src\Contracts\WebSocket.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\cms-propay\vendor\arthurkushman\php-wss\src\Contracts\WebSocket.php on line 12