I have a problème when I start a new world .
I made a mod pack in which, I took several hours to choose the mods, and so I want all my mods, as much as the others. I'm not good at programming, so I'm bad at knocking out mistakes like this. All I know is that it comes from Biomes O plenty, so I send you my mods and the error, thanks for the help .
P.S : Sry for my english , I'm French .
Crash report.txt