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Must be the correct answer.
If you had to bodge it for lack of a masonry bit and drill to drive it you could pack the screw holes with matches (preferably covered in wood glue/pva etc) and put the screws back in. Don't pack the matches too tight. That also won't work all that well if the screws don't have thread the entire length.
Drill through the architrave into the wall behind and put rawl plugs in.