Fatal error: Uncaught Swoole\Exception: Swoole\WebSocket\Server can only be used in CLI mode in /www/wwwroot/kf_server/index.php:2 Stack trace: #0 /www/wwwroot/kf_server/index.php(2): Swoole\Server->__construct() #1 {main} thrown in /www/wwwroot/kf_server/index.php on line 2