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

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java.util.concurrent.ExecutionException: java.lang.NullPointerException
at mcjty.rftoolsdim.dimensions.DimensionStorage.getDimensionStorage(DimensionStorage.java:40)
at mcjty.rftoolsdim.network.ReturnEnergyHelper.setEnergyLevel(ReturnEnergyHelper.java:14)
at mcjty.rftoolsdim.network.PacketReturnEnergy$Handler.lambda$onMessage$0(PacketReturnEnergy.java:44)
at java.util.concurrent.Executors$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.client.Minecraft.func_71411_J(Minecraft.java:1045)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:371)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)

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