Exactly the same problem. I tested several things:
DirectX12 + Texture Streaming, Compile an launching the game = Crash
DirectX12 + Untick Texture Streaming, Compile an launching the game = Works
DirectX11 + Texture Streaming, Compile an launching the game = Works
Build an old backup, with DirectX12 and Texture Streaming, it works. So there is something related to texture in my level.
The solution is to resolving conflicting material GUIDs, and there is a free plugin for that!