[11:00:22] [Server thread/FATAL] [FML/]: Error during network message.
java.lang.reflect.InvocationTargetException
    at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_72]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_72]
    at cn.lambdalib.s11n.network.NetworkMessage$1.invoke(NetworkMessage.java:290) ~[NetworkMessage$1.class:?]
    at cn.lambdalib.s11n.network.NetworkMessage.invokeListener(NetworkMessage.java:218) [NetworkMessage.class:?]
    at cn.lambdalib.s11n.network.NetworkMessage.processMessage(NetworkMessage.java:199) [NetworkMessage.class:?]
    at cn.lambdalib.s11n.network.NetworkMessage.access$000(NetworkMessage.java:56) [NetworkMessage.class:?]
    at cn.lambdalib.s11n.network.NetworkMessage$Handler.onMessage(NetworkMessage.java:353) [NetworkMessage$Handler.class:?]
    at cn.lambdalib.s11n.network.NetworkMessage$Handler.onMessage(NetworkMessage.java:347) [NetworkMessage$Handler.class:?]
    at cpw.mods.fml.common.network.simpleimpl.SimpleChannelHandlerWrapper.channelRead0(SimpleChannelHandlerWrapper.java:37) [SimpleChannelHandlerWrapper.class:1.7.10-R0.1-SNAPSHOT]
    at cpw.mods.fml.common.network.simpleimpl.SimpleChannelHandlerWrapper.channelRead0(SimpleChannelHandlerWrapper.java:17) [SimpleChannelHandlerWrapper.class:1.7.10-R0.1-SNAPSHOT]
    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.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [MessageToMessageDecoder.class:?]
    at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) [MessageToMessageCodec.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:1.7.10-R0.1-SNAPSHOT]
    at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:245) [ej.class:?]
    at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:173) [nc.class:?]
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:991) [MinecraftServer.class:?]
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:431) [lt.class:?]
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:809) [MinecraftServer.class:?]
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:669) [MinecraftServer.class:?]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_72]
Caused by: java.lang.NoClassDefFoundError: cn/academy/vanilla/meltdowner/entity/EntityMDRay
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_72]
    at java.lang.Class.forName(Class.java:264) ~[?:1.8.0_72]
    at cn.academy.ability.api.context.ContextManager.readContextType(ContextManager.java:171) ~[ContextManager.class:?]
    at cn.academy.ability.api.context.ContextManager.access$600(ContextManager.java:48) ~[ContextManager.class:?]
    at cn.academy.ability.api.context.ContextManager$ServerManager.hBeginLink(ContextManager.java:411) ~[ContextManager$ServerManager.class:?]
    ... 28 more
Caused by: java.lang.ClassNotFoundException: cn.academy.vanilla.meltdowner.entity.EntityMDRay
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:101) ~[launchwrapper-1.12.jar:?]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_72]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_72]
    at java.lang.Class.forName0(Native Method) ~[?:1.8.0_72]
    at java.lang.Class.forName(Class.java:264) ~[?:1.8.0_72]
    at cn.academy.ability.api.context.ContextManager.readContextType(ContextManager.java:171) ~[ContextManager.class:?]
    at cn.academy.ability.api.context.ContextManager.access$600(ContextManager.java:48) ~[ContextManager.class:?]
    at cn.academy.ability.api.context.ContextManager$ServerManager.hBeginLink(ContextManager.java:411) ~[ContextManager$ServerManager.class:?]
    ... 28 more