[17:04:03] [Server thread/ERROR] [FML]: There was a critical exception handling a packet on channel AE2
java.lang.NullPointerException
        at appeng.util.Platform.openGUI(Platform.java:342) ~[Platform.class:?]
        at appeng.core.sync.packets.PacketInventoryAction.serverPacketData(PacketInventoryAction.java:127) ~[PacketInventoryAction.class:?]
        at appeng.core.sync.network.AppEngServerPacketHandler.onPacketData(AppEngServerPacketHandler.java:48) ~[AppEngServerPacketHandler.class:?]
        at appeng.core.sync.network.NetworkHandler.serverPacket(NetworkHandler.java:101) ~[NetworkHandler.class:?]
        at cpw.mods.fml.common.eventhandler.ASMEventHandler_348_NetworkHandler_serverPacket_ServerCustomPacketEvent.invoke(.dynamic) ~[?:?]
        at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54) ~[ASMEventHandler.class:?]
        at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:138) ~[EventBus.class:?]
        at cpw.mods.fml.common.network.FMLEventChannel.fireRead(FMLEventChannel.java:103) ~[FMLEventChannel.class:?]
        at cpw.mods.fml.common.network.NetworkEventFiringHandler.channelRead0(NetworkEventFiringHandler.java:30) ~[NetworkEventFiringHandler.class:?]
        at cpw.mods.fml.common.network.NetworkEventFiringHandler.channelRead0(NetworkEventFiringHandler.java:18) ~[NetworkEventFiringHandler.class:?]
        at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[SimpleChannelInboundHandler.class:?]
        at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) ~[DefaultChannelHandlerContext.class:?]
        at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) ~[DefaultChannelHandlerContext.class:?]
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) ~[DefaultChannelPipeline.class:?]
        at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) ~[EmbeddedChannel.class:?]
        at cpw.mods.fml.common.network.internal.FMLProxyPacket.func_148833_a(FMLProxyPacket.java:77) [FMLProxyPacket.class:?]
        at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212) [ej.class:?]
        at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165) [nc.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:334) [lt.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]