1. What happened
Well i configure a vanilla project vith XR packages for Hololens 2 and when i try to use the holographic emulation window, it works for few seconds then unity crashes.

2. How we can reproduce it using the example you attached
Well, i just started a new project, following the MRTK steps to setup the unity project. Then, I customized a few settings on the MRTK gameobject added to the scene. I changed the display settings to set the camera to a solid color rendering. That's all, i think.