Hello,

Sometimes, the server crash during startup.

Mods list:
Forge 14.23.5.2796
IvToolkit 1.3.3 ( requiered for RecurrentComplex ) [Curseforge] [Github]
NomadicTents 9.01
RecurrentComplex 1.4.7 [Curseforge] [Github]
Sponge 7.1.4

Logs:
Latest.log.
Crash Report.

Thank you for letting me know. It looks like I need to fix my custom biome registration. At first I thought it was just the core mod complaining, but it seems minecraft hit an error too

I've updated Nomadic Tents and hopefully fixed Biome registration. Try it out and let me know if it still crashes :D