Crash on loading world

[katubug]

Honestly, I'm not sure how to title this.

I added Caverns and Chasms to my 1.20.1 forge 47.3.7 instance, and loaded the game without issue. I attempted to enter my testing world, and got an "errors in datapacks" warning, so I exited to the menu and tried to load a brand new world, at which point I crashed to desktop.

The crash was a "oops you pressed bad button" type, but the latest.log is frickin' WILD, so I think the actual crash isn't the big problem. Here's the log: https://gist.github.com/katubug/bcd481cbd31f4a788df8cfef7d0c7d60

Thanks for your time!