Cause that door panel is going to have to be off to get to the mechanism inside the door to get the door open. The torx screw that you loosened to get the handle out has to be tightened back up in order to open the door from the inside. Its a pain. You will have to unscrew the screw on the outside of your door where the handle was just enough to loosen it. That will release and let you get access to the mechanism inside your door from the inside. You will have to climb over the drivers seat and get to the mechanism from the inside of your door. It will hang down once you loosened the scew and you will have access to the the torx screw to tighten it. Then put it back in place and tighten the screw on the outside of the door and you should be able to open it from the inside now. Hopefully your window is rolled up and your inside panel is off so you have access to the part inside the door. If not then I would bring it to a dealer. Here's 2 YouTube videos I used to get a idea of how to do it. Sent from my SM-G988U1 using Tapatalk