执行 PCweb，报这个是为什么？
Error: >> session.js:47:16 [master] pid:16844 Platform must in (android, chrom
e, electron, ios, puppeteer)
at Logger.error (D:\macaca\node_modules\xlogger\lib\xlogger.js:169:9)
at detectDevice (D:\macaca\node_modules\webdriver-server\lib\server\contro
llers\session.js:47:16)
at Object.createDevice (D:\macaca\node_modules\webdriver-server\lib\server
\controllers\session.js:13:18)
at createDevice.next ()
at onFulfilled (D:\macaca\node_modules\co\index.js:65:19)
at D:\macaca\node_modules\co\index.js:54:5
at new Promise ()
at Object.co (D:\macaca\node_modules\co\index.js:50:10)
at Object.toPromise (D:\macaca\node_modules\co\index.js:118:63)
at next (D:\macaca\node_modules\co\index.js:99:29)

你好，一些依赖的 jar 包下不到，怎么解决？谢谢