this could be the ags or even windows,
did you run any sfc /scannow to make sure windows wasnt effected?
could be as simple as registry OR
even STEAM.
there are guides on how to wipe steam stuff without erasing all your games (if you are on steam)
if on gog no need there. just make sure to erase and reinstall gog client imo
power outages rarely cause issues with MOST games minus checkpoints, as they can cause corruption in saves but this as you pointed out is a booting game issue,
leads me towards windows or the client(steam) being corrupt not just the game files or save..
easy way to check is have a friend test the save, but again if the issue is the game wont boot
any errors?
just nothing happens?
oddly that only error you put out IS ags code error.. idk mate!