Could you expand upon this a bit? What OS are you testing? I think this only works on Simulator, is that what’s broken? What version of Appium did this work with (to the best of your recall) and what version did it break on? Any more details? Any logs?
I don’t believe that it’s possible to change the location on a real device (happy to be corrected if I’m wrong though). I do know that you can do this for an iOS Simulator or an Android Emulator.