[2020] Uninstalled itself during game.

Make sure you have a nice big pagefile set up. I recommend a custom one at 32 GB. That should hopefully help with the crashing.

https://steamcommunity.com/sharedfiles/filedetails/?id=2114415052&searchtext=pagefile

Keep an eye out for that error though as it could indicate problems with your RAM. Hopefully it's just running out of virtual memory though, so setting up your pagefile will do the trick.