It’s the crux of the law suit? They are claiming that valve are applying it to non-steam key games. I think this is their website steamyouoweus.co.uk/faqs/
These price parity clauses apply to all games listed on Steam, not only those distributed via Steam Keys. As a result, other platforms cannot offer better deals, limiting consumer choice and keeping prices higher across the board. This harms competition in the market and stops other platforms from improving their services.
Though I do think the last part is nonsense.
It also says it in the article, though I suppose it is less clear:
The lawsuit - filed at the Competition Appeal Tribunal in London - alleges Valve “forces” game publishers to sign up to conditions which prevents them from selling their titles earlier or for less on rival platforms.
The exception code you are getting appears to indicate some code is trying to execute something very low level (e.g. direct device access) when it isn’t allowed.
This isn’t a widespread issue, so it seems reasonable to assume that it is specific to your machine.
My guesses are:
Corrupt game files, try deleting the user data for the game. Not sure where that lives.
Corrupt install but I think you’ve addressed that.
Corrupt windows, a scan disk check might repair something.
Corrupt drivers:
Fresh install of GPU drivers, using amd’s tool or ddu.
Update chipset drivers if there are any.
Disable or uninstall anything that controls additional devices. E.g. led or fan controllers like Armoury crate or MSI afterburner.
Any other app that injects itself into the process. Game overlay, antivirus. Amd adrenaline does this, as can steam and gamebar.