I have just returned from 6 weeks in Germany and have experienced recurring problems with the message 'awaiting for valid gps' when the program has acquired more than sufficient satellites! This is usually resolved by closing down Navigator and re-launching, sometimes several times. However it only seems to affect the display as the voice commands seem correct.
I was running Navigator Truck 5.0.62 but on returning home updated to 5.0.63 - should this fix the problem. I have not had an opportunity to test it.
No I just restarted Navigator. Just tried latest version and still get' Waiting for valid GPS signal' even though I have acquired 10 satellites. Running Android 7.1.1 on Samsung Galaxy Tab A.