Eternal_Darky

Hey i know you might not be needing this anymore, but it may be useful for people who might look into this, this occurs because you ran out of IDs for blocks,biomes,items and so on, minecraft limits the amount of IDs you can have at once to fix this you can either download NotEnoughIDs at: https://legacy.curseforge.com/minecraft/mc-mods/notenoughids Or Roughly Enough IDs at https://www.curseforge.com/minecraft/mc-mods/reid Both mods increase the limit for IDs ingame. Hope I help anyone who had the same troubles I had the same time!