我是用以下配置的，但是报错，求大神解答下：
DesiredCapabilities androidCapabilities = new DesiredCapabilities();
androidCapabilities.SetCapability("app", "chrome");
androidCapabilities.SetCapability("device", "Android");
driverAndroidBrowser = new RemoteWebDriver(new Uri("http://127.0.0.1:4723/wd/hub"), androidCapabilities);