java.lang.NullPointerException

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  • java.lang.NullPointerException: Rendering screen at net.minecraft.item.ItemStack.func_82833_r(ItemStack.java:503) at mekanism.common.item.ItemBlockCardboardBox.func_77624_a(ItemBlockCardboardBox.java:55) at net.minecraft.item.ItemStack.func_82840_a(ItemStack.java:610) at net.minecraft.client.gui.GuiScreen.func_146285_a(GuiScreen.java:136) at net.minecraft.client.gui.inventory.GuiContainer.func_73863_a(GuiContainer.java:166) at net.minecraft.client.renderer.InventoryEffectRenderer.func_73863_a(InventoryEffectRenderer.java:51) at net.minecraft.client.gui.inventory.GuiInventory.func_73863_a(SourceFile:47) at net.minecraftforge.client.ForgeHooksClient.drawScreen(ForgeHooksClient.java:382) at net.minecraft.client.renderer.EntityRenderer.func_181560_a(EntityRenderer.java:1094) at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1076) at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:371) at net.minecraft.client.main.Main.main(SourceFile:124) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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