Installing the latest version of the mod the game does not start.

Neoforge 21.0.79
netherdepthsupgrade-3.1.6.jar

crash-2024-07-10_09.56.08-fml.txt

The 1.21 version was made using NF 21.0.0 it might be that in the recent updates something changed with this, so if you want to play with it you might have to downgrade NF for now until I release a more updated version