I had this happen and they had to replace the mechanism. The emergency release didn't work for me either.
If I'm remembering properly, it was explained the latch motor has multiple (3?) phases. If it dies in the middle, the trunk can't open or close. Basically, it closes around the latch and begins to pull down, but the motor locks up as it's pulling down. You'll probably note the trunk is very slightly ajar, to the point you can see a sliver of light through the crack. It dies before it could pull the trunk to the fully closed position. And, as mentioned above, the emergency release won't budge no matter how much you pull it.
They sent out a ranger and had it fixed either same day or the next day. One part was out of stock locally and they even had someone Uber it in from a Service Center in the next state, just to make sure it was fixed quickly.