java.lang.NullPointerException: Unexpected error

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java.lang.NullPointerException: Unexpected error
at lumien.randomthings.block.BlockLightRedirector.func_180663_b(BlockLightRedirector.java:38)
at fi.dy.masa.placementpreview.fake.FakeChunk.setBlockState(FakeChunk.java:68)
at fi.dy.masa.placementpreview.fake.FakeWorld.setBlockState(FakeWorld.java:166)
at fi.dy.masa.placementpreview.event.TickHandler.copyCurrentBlocksToFakeWorld(TickHandler.java:255)
at fi.dy.masa.placementpreview.event.TickHandler.checkAndUpdateBlocks(TickHandler.java:163)
at fi.dy.masa.placementpreview.event.TickHandler.onClientTick(TickHandler.java:84)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_205_TickHandler_onClientTick_ClientTickEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:72)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:168)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1851)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1055)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:371)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)

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