The game crashes while generating a CTOV jungle village with an Immersive Engineering building, due to the belts.

This bug has been mentioned in an issue on the Immersive Engineering github: BluSunrize/ImmersiveEngineering#5723

I have replicated this bug in 1.20.1 NeoForge, with CTOV 3.4.5 and CTOV IE compat 2.0+mod. I've attached a log, though in my case I'm also running several other things and using Sinytra Connector, so it's possible that the logs in the original IE issue linked above may be more helpful.
log paste

I have worked around this crash on my own world with the workaround mentioned in AllTheMods/ATM-9#1383.