java.util.concurrent.ExecutionException: java.lang.NullPointerException

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java.lang.NullPointerException
java.lang.NullPointerException:
at WayofTime.bloodmagic.util.Utils.hasUUID(Utils.java:1184)
at WayofTime.bloodmagic.util.Utils.getUUID(Utils.java:1189)
at WayofTime.bloodmagic.item.armour.ItemLivingArmour.hasLivingArmour(ItemLivingArmour.java:531)
at WayofTime.bloodmagic.item.armour.ItemLivingArmour.getUpgrade(ItemLivingArmour.java:496)
at WayofTime.bloodmagic.util.handler.event.GenericHandler.onEntityHurt(GenericHandler.java:158)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_174_GenericHandler_onEntityHurt_LivingHurtEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:168)
at net.minecraft.entity.EntityLivingBase.func_70665_d(EntityLivingBase.java:1296)
at net.minecraft.entity.passive.EntityAnimal.func_70097_a(SourceFile:64)
at net.minecraft.entity.player.EntityPlayer.func_71059_n(EntityPlayer.java:1293)
at net.minecraft.entity.player.EntityPlayerMP.func_71059_n(EntityPlayerMP.java:1226)
at net.minecraft.network.NetHandlerPlayServer.func_147340_a(NetHandlerPlayServer.java:1040)
at net.minecraft.network.play.client.CPacketUseEntity.func_148833_a(SourceFile:68)
at net.minecraft.network.play.client.CPacketUseEntity.func_148833_a(SourceFile:12)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at net.minecraft.util.Util.func_181617_a(SourceFile:45)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:387)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:613)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:471)
at java.lang.Thread.run(Thread.java:745)

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