Stick wooden toothpicks into the holes. Break them off flush with the surface. Then replace the screws and they should hold.
an old carpenter trick is to use golf tees [ they are made from a very hard dense wood]. insert them into the ***** holes , break them off so they dont stick out and reinstall screws . if this doesnt work use longer screws whihch will extend past door frame into 2×4 . good luck
A cheap trick… take round toothpicks, coat with Elmers glue, jam into hole,it should take at least three per hole…jam them in, after glue dries take your knife and cut off excess.
put your screws in, so that they go in the middle of each group of toothpicks……
The after-sales can help you lots. good luck