2001 Jeep Cherokee Rear Hatch will not unlock or lock with

Recently my rear hatch on my '01 Jeep Grand Cherokee will not unlock with the remote control. It will still auto-lock with the rest of the doors, but I have to crawl inside and unlock it from the inside to use cargo area. Anyone have any ideas of what this may be and how much this will cost?

P.S. I haven't noticed any weird sounds or anything like it was going bad, so I was HOPING it would be something as simple as a bad fuse. I know squat about cars so any help is appreciated.

Thank you in advance!