Client cannot join LAN SMP Instance

[midorlo]

Win10x64, current additionals. Fresh pack from today. Set to easymode, recommenced optionals. Manual optionals are Fastcraft and JourneyMap. Run the game. Change language to german. Open to LAN and let the other client join. Get this:

   [20:48:46] [Netty IO #3/ERROR] [FML/]: NetworkDispatcher exception
io.netty.handler.codec.EncoderException: java.lang.IllegalArgumentException: Don't know how to serialize BaseComponent{style=Style{hasParent=false, color=ȣ, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null}, siblings=[]} as a Component
    at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:129) ~[MessageToByteEncoder.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeWrite(DefaultChannelHandlerContext.java:644) ~[DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.write(DefaultChannelHandlerContext.java:698) ~[DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.write(DefaultChannelHandlerContext.java:637) ~[DefaultChannelHandlerContext.class:?]
    at cpw.mods.fml.common.network.handshake.NetworkDispatcher.write(NetworkDispatcher.java:440) ~[NetworkDispatcher.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.invokeWrite(DefaultChannelHandlerContext.java:644) ~[DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.write(DefaultChannelHandlerContext.java:698) ~[DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.writeAndFlush(DefaultChannelHandlerContext.java:688) ~[DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelHandlerContext.writeAndFlush(DefaultChannelHandlerContext.java:717) ~[DefaultChannelHandlerContext.class:?]
    at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:893) ~[DefaultChannelPipeline.class:?]
    at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:239) ~[AbstractChannel.class:?]
    at net.minecraft.network.NetworkManager$1.run(NetworkManager.java:174) [ek.class:?]
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:354) [SingleThreadEventExecutor.class:?]
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:348) [NioEventLoop.class:?]
    at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101) [SingleThreadEventExecutor$2.class:?]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_92]
Caused by: java.lang.IllegalArgumentException: Don't know how to serialize BaseComponent{style=Style{hasParent=false, color=ȣ, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null}, siblings=[]} as a Component
    at net.minecraft.util.IChatComponent$Serializer.serialize(SourceFile:165) ~[fk.class:?]
    at net.minecraft.util.IChatComponent$Serializer.serialize(SourceFile:29) ~[fk.class:?]
    at com.google.gson.TreeTypeAdapter.write(TreeTypeAdapter.java:70) ~[TreeTypeAdapter.class:3.2.3.1]
    at com.google.gson.Gson.toJson(Gson.java:593) ~[Gson.class:3.2.3.1]
    at com.google.gson.Gson.toJson(Gson.java:572) ~[Gson.class:3.2.3.1]
    at com.google.gson.Gson.toJson(Gson.java:527) ~[Gson.class:3.2.3.1]
    at com.google.gson.Gson.toJson(Gson.java:507) ~[Gson.class:3.2.3.1]
    at net.minecraft.util.IChatComponent$Serializer.func_150696_a(SourceFile:172) ~[fk.class:?]
    at net.minecraft.network.play.server.S02PacketChat.func_148840_b(SourceFile:33) ~[gj.class:?]
    at net.minecraft.util.MessageSerializer.encode(SourceFile:38) ~[fa.class:?]
    at net.minecraft.util.MessageSerializer.encode(SourceFile:14) ~[fa.class:?]
    at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:111) ~[MessageToByteEncoder.class:?]
    ... 15 more