The crash as it manifested for me last night, right as I was about to win a pitched fight.

If you’re getting the “ERR12" crash in Monster Hunter: World on PC, you’re not alone. It’s hard to know for sure what’s causing it, but it seems to be an Nvidia driver issue. I’ve asked Nvidia what’s up, and in the meantime have managed to stop the crashes on my end by rolling back to the 398.36 driver. Worth a shot if you’re getting them, too.