Hello and Welcome..
My name is***** happy to help / advise..
More often than not - these faults are caused by damage to - or breaks in the wiring - where the wires / cables run through from the body - through the link tubing to the door on the affected side.
So if you open the door there - you will see - near the hinges, the said tubing - you need to carefully open that all up and check for said damage as above.
Obviously repair what you find at fault - and that will cure this - BUT , if you dont find any issues there- check then back in where the wires go back into the vehicle body - up the inner side of the dash area.... and then too - you will need to remove the door panel / card to gain access into the inside of the door - checking there then where the wires go into the foor you will find the faults there.
One way or the other you will find it that way - hopefully, it will just be found inside the door link tube - that is common.
Let me know how you go..and / or let me know if you need anything further on this..
~>>~~>>~ Meanwhile right now - Please do click on the "Exc / Ok rating" for me at this time.. "Thank you" in advance for that .
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Best Rgds, MIKE