Steam proton won't launch any game (since pressure-vessel)

I do update my system often as I like to use new versions as soon as they appear.

To be sure, I did update and rebooted and tried, with no success.

I’m not sure what this downgrade option is, but I don’t remember doing that… I recently reinstalled my video driver with mhwd to resolve another problem (Stuck at boot after gdm starts) should I re-reinstall it ?

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