Workerman version:4.0.4 找不到WebServer类

C:\Users\22819\Desktop\chat\vendor\GatewayWorker>php Applications\YourApp\start_register.php Applications\YourApp\start_gateway.php Applications\YourApp\start_businessworker.php Applications\YourApp\start_web.php
----------------------- WORKERMAN -----------------------------
Workerman version:4.0.4 PHP version:7.3.10
------------------------ WORKERS -------------------------------
worker listen processes status
Register text://0.0.0.0:1238 1 [ok]
YourAppGateway websocket://0.0.0.0:8282 4 [ok]
YourAppBusinessWorkernone 4 [ok]
PHP Fatal error: Uncaught Error: Class 'Workerman\WebServer' not found in C:\Users\22819\Desktop\chat\vendor\GatewayWorker\Applications\YourApp\start_web.php:23