Abigail De Portillo

My car ran out of gas a couple of weeks ago. And of course at that point it lost complete power. After that point my rear liftgate which is manual would not open. I have replaced the touchpad sensor and the lock actuator motor . The fuse under the hood for the liftgate is in working condition. I've checked other fuses that were inside as well and they seem to be okay. Does anybody have any other suggestions what it could be. I have seven children so my car is usually full which makes it very difficult to even open it from the inside.
thanks