[19:40:00] [Client thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.ClassCastException: net.noxumbrarum.murphyslaw.blocks.machinetest.ContainerMachine cannot be cast to net.minecraft.client.gui.GuiScreen
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_25]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_25]
	at net.minecraft.util.Util.runTask(Util.java:26) [Util.class:?]
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1107) [Minecraft.class:?]
	at net.minecraft.client.Minecraft.run(Minecraft.java:404) [Minecraft.class:?]
	at net.minecraft.client.main.Main.main(Main.java:118) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_25]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_25]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_25]
	at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_25]
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_25]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_25]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_25]
	at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_25]
	at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
	at GradleStart.main(GradleStart.java:26) [start/:?]
Caused by: java.lang.ClassCastException: net.noxumbrarum.murphyslaw.blocks.machinetest.ContainerMachine cannot be cast to net.minecraft.client.gui.GuiScreen
	at net.minecraftforge.fml.client.FMLClientHandler.showGuiScreen(FMLClientHandler.java:492) ~[FMLClientHandler.class:?]
	at net.minecraftforge.fml.common.FMLCommonHandler.showGuiScreen(FMLCommonHandler.java:309) ~[FMLCommonHandler.class:?]
	at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:103) ~[FMLNetworkHandler.class:?]
	at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2702) ~[EntityPlayer.class:?]
	at net.minecraftforge.fml.common.network.internal.OpenGuiHandler.process(OpenGuiHandler.java:39) ~[OpenGuiHandler.class:?]
	at net.minecraftforge.fml.common.network.internal.OpenGuiHandler.access$000(OpenGuiHandler.java:15) ~[OpenGuiHandler.class:?]
	at net.minecraftforge.fml.common.network.internal.OpenGuiHandler$1.run(OpenGuiHandler.java:30) ~[OpenGuiHandler$1.class:?]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_25]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_25]
	at net.minecraft.util.Util.runTask(Util.java:25) ~[Util.class:?]
	... 15 more