EasterBells

The game crashed whilst exception in server tick loop The game crashed whilst exception in server tick loopError: java.lang.NoSuchMethodError: net.minecraft.entity.EntityLiving$SpawnPlacementType.canSpawnAt(Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;)Z it seems to give no hints to what mod is causing it so i have no idea what to do, should i just start deleting and replacing mods as I've done til now?