I was creating a new world, and was going to name it Onyx, but when I hit the X key, the game freaked out, said saving world and CTD. Here's a crash report!
https://pastebin.com/MpDPFkuT
And most relevant part of latest.log
https://pastebin.com/ixY1nAFb
Hope this is somehow helpful! If not, please disregard :)
And yes, it may be one of my many mods conflicting.... But it could be useful!

Yes major fuck up on my part, going to need to fix this asap.

Yay, I'm helpful!