Update: It crash both on DX11 and DX12 but using PROTON_HIDE_NVIDIA_GPU=1 fixes the editor crashing.
Just doing PROTON_DISABLE_NVAPI=1 works too, likely an https://github.com/jp7677/dxvk-nvapi issue.
proton experimentalx1 2025-08PROTON_DISABLE_NVAPI=1`x1 2025-08PROTON_HIDE_NVIDIA_GPU=1`x1 2025-08
Compatibility Report
System Information
I confirm:
Symptoms
Game crash when opening the map editor
Reproduction
steam-2012510.log.gz