Ok so basically the mod is brilliant and works just fine on single player, but on the server me and my buddies have encountered issue when some on us right clicked on bison for example this crash occured.

The game crashed: unexpected error
Error: java.lang.NullPointerException: Cannot invoke "untamedwilds.util.EntityDataHolder.getFavouriteFood(int)" because the return value of "untamedwilds.entity.ComplexMob.getEntityData(net.minecraft.world.entity.EntityType)" is null

Any help would be more than welcome.