What exactly do I need to do to reproduce this?
Edit: nvm, I see validation errors but mesa release builds don't have asserts.
When dropping in a build of current master, it complains about ID3D11VkExtDevice2 missing but otherwise runs fine, I don't see the validation error in question anymore. Probably some bug in either 2.1 which their fork is based on, or the fork itself.
Can repro with Proton using DXVK 2.1, devs might want to update their dxvk-native.
Nothing extracted yet.
See https://gitlab.freedesktop.org/mesa/mesa/-/issues/10467 for reference. Looks like the game use a DXVK fork but even with a recent build I was able to reproduce vvl errors. The most important one is:
which triggers an assertion in debug build in Mesa.