Not really sure if a blank project would reproduce this, as I had a bunch of foliage in the scene at the time, and then tried to save the tree asset. If you tried to reproduce the error, I suppose you would have to have a scene with a lot of trees, then try to change the lightmass resolution of them (I turned them down from 16 to 8).
I was not using the foliage tool at all when the crash occurred. I was just trying to fix flickering shadows.
I did indeed find logs saved in the saved folder, hopefully they can help. I don’t see an option for spoiler tags here, so I’ll paste the log below this reply.
There are assets in the backup folder, I have so far only copied the assets from my Autosave folder into my Content folder. Should I copy the Backup assets to the Content folder as well?
I had no idea Source Control was even a thing until I Googled this issue. Is there a reason it’s off by default? Seems like it would be helpful.