MC crashes at startup if I disable biomes. Go in the config, under "Master", and set "Biomes: Enable Biomes" to false, in order to reproduce this bug. It also happens when I set to false any of the biomes individually.

Crash Logs
https://paste.dimdev.org/lunojucacu.mccrash

Update the mod to the newest version, it should fix the bug,

Sorry I misread my version #. I will update my version of this mod.