Hi, I was talking to someone from MG NZ ealier who said the reset as I did normally fix's the issue, but the prime issue is the time, if its set to manual and is too far out from the correct regional time, the system reports the error seen, so the fix is either put the time on auto and let the GPS correct it (also ensure the GPS is operational, ie not parked in a garage where it cannot see any satellites) or do a factory reset as discussed above, and ensure the car has GPS service. Also note satellite acquisition may take a few minutes once the car has clear sky.
Cyril