[16:22:32] [Client thread/FATAL] [FML]: Exception caught executing FutureTask: java.util.concurrent.ExecutionException: java.lang.ClassCastException: majgenrelativity.forcelasers.allthecontainers.ForceFieldEmitterContainer cannot be cast to net.minecraft.client.gui.GuiScreen
java.util.concurrent.ExecutionException: java.lang.ClassCastException: majgenrelativity.forcelasers.allthecontainers.ForceFieldEmitterContainer cannot be cast to net.minecraft.client.gui.GuiScreen
	at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_31]
	at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_31]
	at net.minecraftforge.fml.common.FMLCommonHandler.callFuture(FMLCommonHandler.java:710) [FMLCommonHandler.class:?]
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1070) [Minecraft.class:?]
	at net.minecraft.client.Minecraft.run(Minecraft.java:376) [Minecraft.class:?]
	at net.minecraft.client.main.Main.main(Main.java:117) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_31]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_31]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_31]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_31]
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.11.jar:?]
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]
	at net.minecraftforge.gradle.GradleStartCommon.launch(Unknown Source) [start/:?]
	at GradleStart.main(Unknown Source) [start/:?]
Caused by: java.lang.ClassCastException: majgenrelativity.forcelasers.allthecontainers.ForceFieldEmitterContainer cannot be cast to net.minecraft.client.gui.GuiScreen
	at net.minecraftforge.fml.client.FMLClientHandler.showGuiScreen(FMLClientHandler.java:446) ~[FMLClientHandler.class:?]
	at net.minecraftforge.fml.common.FMLCommonHandler.showGuiScreen(FMLCommonHandler.java:344) ~[FMLCommonHandler.class:?]
	at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:98) ~[FMLNetworkHandler.class:?]
	at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2577) ~[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(Unknown Source) ~[?:1.8.0_31]
	at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_31]
	at net.minecraftforge.fml.common.FMLCommonHandler.callFuture(FMLCommonHandler.java:709) ~[FMLCommonHandler.class:?]
	... 11 more