webdriveragent 已经成功安装到手机上。

已安装 app-inspector，启动时报错如下：
$ app-inspector -u 设备 uuid —verbose

xctestwd start with port: 8001
XCTestWD version: 1.1.0
undefined
iOS device started: 设备 uuid
inspector start at: http://192.168.30.8:5678
<-- GET /

Error: connect ECONNREFUSED 127.0.0.1:8001
at Object.exports._errnoException (util.js:1018:11)
at exports._exceptionWithHostPort (util.js:1041:20)
at TCPConnectWrap.afterConnect as oncomplete

是 xctestwd 没有启动吗？如何解决呢？