The access violation errors can be a number of different issues. I generally recommend starting with process of elimination. I’d try swapping your project to use DirectX 11 instead of 12. I’d also check your system specs against how much your project/level has to render as that can cause this issue. Then there’s even specific issues with files in the project that can cause it. This is a post I was working with a user recently that resolved their problem and it was not related to rendering. I’d check out all avenues. But, definitely start with DirectX 11. Let me know if it fixes it!