[Solved] appium Error: An unknown server-side error occurred while processing the command

Error Messages:

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

Solution:
Close/uninstall the service

adb uninstall io.appium.settings

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

Re execution, automatic installation