Not perfect but decent news for SteamDeck user's.
I got a response from Valve with an official temporary fix.
1. First, do you have any third-party utilities installed like Decky or CryoUtils? If so, could you try removing them and re-test?
2. For BG3, just to get us working from a baseline, you can untick the Force Compatibility option in the Compatibility tab
3. Could you try running BG3 from Steam in Desktop mode and let us know if that allows a successful launch or not?
So pont 1-2 was not working and it was irrelevant to me because 1. I don't installed cryo. 2. I uninstalled decky and I still had the problem.
But on desktop mod the game started a little bit slower but it runs one again.
I am so glad for this.
