I have been getting this error now on a program I downloaded a while back. All the suggestions I could find involve reinstalling the Flash Player, but that seems to be impossible right now after it was discontinued. Is there any way I can still get the particular files I need to fix this?
I managed to find the answer here:
Reddit - How to use apps that rely on ActiveX in 2021?
Option 1:
Seems like installing in Windows 7 compatibility mode is enough.
Download the Flash Player installer here:
https://archive.org/download/flashplayerarchivedversions2/357/fp_32.0.0.344_archive.zip
Option 2:
Follow the 12 steps process shown in this main post...