Fatal error: Uncaught Error: Interface 'React\Stream\DuplexStreamInterface' not found in /home/soh-works/www/websoket-sample/vendor/react/socket/src/ConnectionInterface.php:55 Stack trace: #0 {main} thrown in /home/soh-works/www/websoket-sample/vendor/react/socket/src/ConnectionInterface.php on line 55