So all of these posts make me feel better. It happened out of the blue. I believe the satellite explanation as we all experienced it at about the same time. I will be checking back.
And I have no idea where the reset button is on a 2015 Sedona dash. Not finding the tiny button.
SiriusXM had a satellite go down effecting all Kia and Hyundai Cars with NAV. You will need to put your car into accessory mode and reseat the SD card.
Pop out the SD Card and push it back in, it's behind the little cover.