GoPiGo3 Save and Exit - not

After updating successfully, I see the new GoPiGo3 Control Panel app.

I am unable to set my GoPiGo3 wheel and wheelbase parameters in the desktop program. (It does not do anything after clicking “Save and Exit”)

There is no error reported to the stdout:

pi@Carl:~ $ python /home/pi/Dexter/GoPiGo3/Software/Python/Examples/Control_Panel/
Xlib:  extension "RANDR" missing on display ":1.0".
pi@Carl:~ $ 

I added to onSave():

except Exception as e:
            print("onSave exception {}".format(e))

and see

onSave exception [Errno 13] Permission denied: '/home/pi/Dexter/gpg3_config.json'
pi@Carl:~ $ ls -al /home/pi/Dexter/gpg3_config.json
ls: cannot access '/home/pi/Dexter/gpg3_config.json': No such file or directory