appium相关问题处理：An unknown server-side error occurred while processing the command

 问题描述：

UnknownError: An unknown server-side error occurred while processing the command. Original error: Could not proxy command to the remote server. Original error: socket hang up

解决办法： 

关闭/卸载服务

adb uninstall io.appium.settings

adb uninstall io.appium.uiautomator2.server.test
     
adb uninstall io.appium.uiautomator2.server  

重新执行，自动安装