[Antz]

Whip the doorcard off and see whats up. My guess is the metal rod that connects the handle to the door lock has come off at one end. Either by falling off or its snapped one of the attachments.

You should be able to see my removing the door card, peeling back the plastic and peering in with a torch.

Doorcard removal.
Two covered screws down outer edge.
One screw behind speaker cover
One covered screw above door pocket
One covered screw below mirror
One covered screw for the window switch and interior handle.
Then give it a good tug to remove all the clips at the bottom and lift it off at the top.