hi @ProjectZ3RO ,
The Shaders model 6 have not been rebuilt for DX12.
In Editor-> Project Settings ->Windows ( Rendering) you must set DX12 as the default and turn OFF SM5. Turn (ON Tick) SM6 shaders
When you restart/reload the project the shaders will be rebuilt
This is all covered in detail in this post by Community Poster
Any version crash!!! - Development / Programming & Scripting - Epic Developer Community Forums (unrealengine.com)