Thanks a lot for the report!
Unfortunately it's a crash that's affecting a few NVIDIA users atm... it mostly affects newer, high end NVIDIA cards (but sometimes older graphics cards are also affected). It greatly depends on the driver version. Some users managed to fix these crashes by installing the latest graphics driver, but this didn't always help.
It appears to be a mix of an engine bug and a graphics driver issue. Unity 6 (especially in combination with the HDRP) is one of the most unstable releases I've seen... but unfortunately NVIDIA's driver quality also decreased considerably since their focus shift towards AI...
There is one thing your husband could try: go to the graphics settings and disable "Decals". Not sure if that helps in your case, but it could be worth a try...
If that doesn't help, I'm afraid there isn't much that could be done atm... sorry for not having positive news
However, we're updating to the latest Unity version with the upcoming update, which hopefully fixes this issue. If your husband still runs into these crashes after the next update, please let me know! ![]()