Cause and Effect, no threads, stripped out.
When I have this same problem on sheet metal (The small #10 cowl panel retaining screws are a classic example), I cut a small-ish square of new sheet, say 1.5"sq, drill a pilot hole in the center of it in the correct screw's diameter, scratch up and clean the surfaces for adheasion, and then JB Weld that piece of sheet to the backside of the panel using the correct screw to retain it through the stripped thread until the JB Weld sets.
I find that the easiest way.
Welding burns paint, blows holes and hardens the sheet making it impossible to re-drill.
Food for thought.