Hi there, try running DX11 or Vulkan in the game folder.
Maybe I can help. The Game has Issues launching when the Gamefolder has too many Subfolders.
So for example when it´s like this: ProjectTeaserV0.9.4 - ProjectTeaserV0.9.4 - ProjectTeaserV0.9.4 - ProjectTeaser - Windows - ProjectTeaser.exe
the Game will always Crash with a Fatal Error Message just like you descriped, the other DX11 and Vulcan exe also produce the same Error.
Test this if you don´t believe me. I can reproduce this with 2 or more Subfolders Name doesn´t matter.
To fix this just shorten up the path to the exe like this: ProjectTeaserV0.9.4 - ProjectTeaser - Windows - ProjectTeaser.exe. Than the Game should launch without Problems.
It might still softlock during bootup but this can be fixed by just ending the Game in Task Manager and relaunching the Game.
I am not sure why the exe is so stinchy with too many Subfolders though... Really no Idea why this is the case.