java.lang.NullPointerException

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  • java.lang.NullPointerException: Updating screen events at mekanism.common.inventory.container.ContainerChemicalOxidizer.<init>(ContainerChemicalOxidizer.java:42) at mekanism.client.gui.GuiChemicalOxidizer.<init>(GuiChemicalOxidizer.java:39) at mekanism.client.ClientProxy.getClientGui(ClientProxy.java:769) at mekanism.client.ClientProxy.getClientGui(ClientProxy.java:249) at mekanism.common.CoreGuiHandler.getClientGuiElement(CoreGuiHandler.java:25) at net.minecraftforge.fml.common.network.NetworkRegistry.getLocalGuiContainer(NetworkRegistry.java:273) at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:110) at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2494) at mekanism.client.gui.GuiRobitMain.func_73864_a(GuiRobitMain.java:284) at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:548) at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:517) at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1700) at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1055) 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(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
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