rubber-duck

Same issue here. Identical error box. [steam-1151640.log](https://github.com/ValveSoftware/Proton/files/5046187/steam-1151640.log) [steam-sysinfo.txt](https://github.com/ValveSoftware/Proton/files/5046188/steam-sysinfo.txt)

Try the "Proton Experimental" with the Experimantal setting: "_bleeding-edge - latest and untested dxvk, vkd3d-proton and wine changes; backup your prefixes before using_". It is a Workaround from @dellas

It still works for me with Proton Experimental (GPU: Nvidia GTX 1070). I believe that all old Nvidea 10s work.

In fact, I have to revise my last statement. My last error-free game was on 28.03. Now it is just as unplayable as yours.