[Client thread/FATAL] [FML]: Exception caught executing FutureTask: java.util.concurrent.ExecutionException: java.lang.IndexOutOfBoundsException: readerIndex(256) + length(1) exceeds writerIndex(256): UnpooledHeapByteBuf(ridx: 256, widx: 256, cap: 256/266)
java.util.concurrent.ExecutionException: java.lang.IndexOutOfBoundsException: readerIndex(256) + length(1) exceeds writerIndex(256): UnpooledHeapByteBuf(ridx: 256, widx: 256, cap: 256/266)
    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.minecraftforge.fml.common.FMLCommonHandler.callFuture(FMLCommonHandler.java:677) [FMLCommonHandler.class:?]
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1011) [bsu.class:?]
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:345) [bsu.class:?]
    at net.minecraft.client.main.Main.main(SourceFile:120) [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-1.11.jar:?]
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]
Caused by: java.lang.IndexOutOfBoundsException: readerIndex(256) + length(1) exceeds writerIndex(256): UnpooledHeapByteBuf(ridx: 256, widx: 256, cap: 256/266)
    at io.netty.buffer.AbstractByteBuf.checkReadableBytes(AbstractByteBuf.java:1161) ~[AbstractByteBuf.class:4.0.15.Final]
    at io.netty.buffer.AbstractByteBuf.readByte(AbstractByteBuf.java:563) ~[AbstractByteBuf.class:4.0.15.Final]
    at net.minecraft.network.PacketBuffer.readByte(SourceFile:609) ~[hd.class:?]
    at net.minecraft.network.PacketBuffer.func_150792_a(SourceFile:109) ~[hd.class:?]
    at net.minecraft.network.PacketBuffer.func_150789_c(SourceFile:235) ~[hd.class:?]
    at net.minecraft.client.network.NetHandlerPlayClient.func_147240_a(NetHandlerPlayClient.java:1691) ~[cee.class:?]
    at net.minecraft.network.play.server.S3FPacketCustomPayload.func_180734_a(SourceFile:52) ~[ji.class:?]
    at net.minecraft.network.play.server.S3FPacketCustomPayload.func_148833_a(SourceFile:9) ~[ji.class:?]
    at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) ~[ih.class:?]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_25]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_25]
    at net.minecraftforge.fml.common.FMLCommonHandler.callFuture(FMLCommonHandler.java:676) ~[FMLCommonHandler.class:?]
    ... 9 more