Scan the QR code for help :) j/k - that "QR code" is a pattern imprinted on the shutter curtains to help with weighted exposure.
Irrespective of camera model, the problem described is often due to one of the following causes:
Battery exhausted on an electronic-shutter camera (which the OM-40 is). Try replacing the battery; in some cases removing, resting, and reinserting the battery could also help.
Accidentally activated a manual mirror-lock up feature (seems the OM-40 hasn't any, though).
General film-advance/shutter-cocking mechanical confusion that can in some cases be cleared up (or worsened...) by carefully actuating winder couplings manually - YMMV...
For this specific camera model, there also seems to be a known wear defect called "sticky magnet syndrome" which might (hopefully not) apply here...