forge crash

[20:34:14] [Client thread/FATAL]: Reported exception thrown!
net.minecraft.util.ReportedException: Ticking screen
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1675) ~[bao.class:?]
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:973) ~[bao.class:?]
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:898) [bao.class:?]
	at net.minecraft.client.main.Main.main(SourceFile:148) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_40]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_40]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_40]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_40]
	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:?]
Caused by: java.lang.NullPointerException
	at net.minecraft.client.network.NetHandlerPlayClient.func_147282_a(NetHandlerPlayClient.java:238) ~[bjb.class:?]
	at net.minecraft.network.play.server.S01PacketJoinGame.func_148833_a(SourceFile:70) ~[hd.class:?]
	at net.minecraft.network.play.server.S01PacketJoinGame.func_148833_a(SourceFile:13) ~[hd.class:?]
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212) ~[ej.class:?]
	at net.minecraft.client.multiplayer.GuiConnecting.func_73876_c(SourceFile:78) ~[bcx.class:?]
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1661) ~[bao.class:?]