From time to time I load plywood, lumber or oversize stock in my 2017 Pathfinder Platinum and to keep the liftgate down I jam ratchet strap hooks in the lock and trailer hitch and snug them up . Usually, when I would press the unlock button it would release the lock, but not this time and all the other power liftgate functions also became inoperative. I tried the reset procedure with the door fully open (on my model, holding the close button on the bottom edge only elicits 2 beeps period, regardless of how long you hold it) and the entire assembly remained dead . I finally opened the access panel at the inside bottom edge of the liftgate and found a release lever for the lock . After unlocking, I closed the liftgate manually and the lock actuator that pulls the door tight finally kicked in . After this all of the hands free liftgate functions returned to normal .