I have a 2013 GT with the 8" touchscreen. Last weekend I needed to use the GPS. When I clicked on it, I got an error saying "Can't Unlock Maps." I click OK on that and then get another message saying "Detailed maps are required for routing. No detailed maps were found on this unit." I close that error and the map seems to sort of know where I am but it shows me as just being off the road I'm actually on. What gives? Do I need to bring it to the dealer?