Error in Console

[undersquire]

For some reason, I am getting this unusual error:

Version: 1.8.8
Atlas: 1.6.6

[Server] WARN at java.lang.reflect.Method.invoke(Method.java:498)
21.12 16:24:55 [Server] WARN at cc.funkemunky.api.reflections.types.WrappedMethod.invoke(WrappedMethod.java:34)
21.12 16:24:55 [Server] WARN at cc.funkemunky.api.events.EventManager.callEvent(EventManager.java:79)
21.12 16:24:55 [Server] WARN at cc.funkemunky.api.tinyprotocol.api.TinyProtocolHandler.onPacketOutAsync(TinyProtocolHandler.java:69)
21.12 16:24:55 [Server] WARN at cc.funkemunky.api.tinyprotocol.api.TinyProtocolHandler$2.onPacketOutAsync(TinyProtocolHandler.java:38)
21.12 16:24:55 [Server] WARN at cc.funkemunky.api.tinyprotocol.api.packets.channelhandler.TinyProtocol1_8$PacketInterceptor.write(TinyProtocol1_8.java:552)
21.12 16:24:55 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:658)
21.12 16:24:55 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:716)
21.12 16:24:55 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:706)
21.12 16:24:55 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:741)
21.12 16:24:55 [Server] WARN at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:895)
21.12 16:24:55 [Server] WARN at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:240)
21.12 16:24:55 [Server] WARN at net.minecraft.server.v1_8_R3.NetworkManager$4.run(NetworkManager.java:198)
21.12 16:24:55 [Server] WARN at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:380)
21.12 16:24:55 [Server] WARN at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:268)
21.12 16:24:55 [Server] WARN at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
21.12 16:24:55 [Server] WARN at java.lang.Thread.run(Thread.java:748)
21.12 16:24:55 [Server] WARN Caused by: java.lang.NullPointerException
21.12 16:24:55 [Server] WARN java.lang.reflect.InvocationTargetException
21.12 16:24:55 [Server] WARN at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
21.12 16:24:55 [Server] WARN at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
21.12 16:24:55 [Server] WARN at java.lang.reflect.Method.invoke(Method.java:498)
21.12 16:24:55 [Server] WARN at cc.funkemunky.api.reflections.types.WrappedMethod.invoke(WrappedMethod.java:34)
21.12 16:24:55 [Server] WARN at cc.funkemunky.api.events.EventManager.callEvent(EventManager.java:79)
21.12 16:24:55 [Server] WARN at cc.funkemunky.api.tinyprotocol.api.TinyProtocolHandler.onPacketOutAsync(TinyProtocolHandler.java:69)
21.12 16:24:55 [Server] WARN at cc.funkemunky.api.tinyprotocol.api.TinyProtocolHandler$2.onPacketOutAsync(TinyProtocolHandler.java:38)
21.12 16:24:55 [Server] WARN at cc.funkemunky.api.tinyprotocol.api.packets.channelhandler.TinyProtocol1_8$PacketInterceptor.write(TinyProtocol1_8.java:552)
21.12 16:24:55 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:658)
21.12 16:24:55 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:716)
21.12 16:24:55 [Server] WARN at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:706)

Not sure what is causing it,