Honestly, I didn't track them all down. I had 72 errors when I tried loading, so I quit the game, reinstalled 2.8.1 and everything still works fine.
I'm not sure what benefit 3.0.1 brings to the game, but all of the mods seem to work just fine without it, and I'm running in excess of 100 mods (some small tweaks to some very large part packs and visuals)