I had this same situation doing my window regulator. Could be two things, there's a small allen bolt you can access through a rubber cap on the side of the door. You can look up door handle adjustment to find a video on it, if the bolt loosens itself that will cause the handle not to work.
The problem I had was that the outer sheath of the door handle cable clips onto a ledge near the actuator. Door panel needs to be off to reach it. Green clip here. Sits by the window regulator rail.
The problem I had was that the outer sheath of the door handle cable clips onto a ledge near the actuator. Door panel needs to be off to reach it. Green clip here. Sits by the window regulator rail.