Dan Bernasconi, You will have to disassemble the doors(remove trim panels) and see if cables are broke/stretched, check and lubricate latch mechanism's liberally. Below are a few links to show what the likely problem is and the repair. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.
https://www.youtube.com/watch?v=7Ta7yx26qwM
https://www.youtube.com/watch?v=2J4LIfsuwKg
https://www.youtube.com/watch?v=AvpM6boLYbE
https://www.youtube.com/watch?v=z5WyWer3LLo