Only thing I can think of for such a newer vehicle is the something broke inside the transmission. When you feel the clicks shifting, this is a spring loaded ball bearing that keeps the parking pawl in position. Older cars I would say the cable locked. You can remove the cable from the transmission shifter and see if it will move by hand. If not, remove the drive shaft and have it towed safely. Remove the end at the transmission. Six bolts and the rubber piece. Have a pry bay to get the rubber out.