VoltX

Whenever I try to load up my Minecraft 1.12.2 world, I get this crash report: The game crashed whilst exception in server tick loop Error: java.lang.NoSuchMethodError: net.minecraft.entity.EntityLiving$SpawnPlacementType.canSpawnAt(Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;)Z I am only using the Chisel and Bits mod, but I am also using Optifine, it is the 1.12.2 and I am not using any shaders. How can I fix this?