No problem! Yeah, I saw that too. Though it's from 2013 and before even Windows 10 but since it happened on Windows at one point says it might not be all related to translation layers.
Game uses DirectX 9 since it has a d3d dll in the game files. But I have no idea how can I check what Proton uses.

No problem! :)
Actually
PROTON_USE_WINED3D=1was one of the first things I have tried. Sadly it still gives the same error.Currently I'm using GE-Proton10-15. These are the logs: