fix it

cool

[15:37:57] [Netty Epoll Server IO #8/ERROR] (Minecraft) java.lang.AbstractMethodError: io.netty.buffer.ByteBuf.capacity()I
Aug 28, 2020 3:37:58 PM io.netty.util.concurrent.DefaultPromise notifyListener0
WARNING: An exception was thrown by net.minecraft.server.network.ServerPlayNetworkHandler$1.operationComplete()
io.netty.util.concurrent.BlockingOperationException: DefaultChannelPromise@6f192106(uncancellable)
	at io.netty.util.concurrent.DefaultPromise.checkDeadLock(DefaultPromise.java:390)
	at io.netty.channel.DefaultChannelPromise.checkDeadLock(DefaultChannelPromise.java:157)
	at io.netty.util.concurrent.DefaultPromise.awaitUninterruptibly(DefaultPromise.java:283)
	at io.netty.channel.DefaultChannelPromise.awaitUninterruptibly(DefaultChannelPromise.java:135)
	at io.netty.channel.DefaultChannelPromise.awaitUninterruptibly(DefaultChannelPromise.java:28)
	at net.minecraft.network.ClientConnection.disconnect(ClientConnection.java:223)
	at net.minecraft.server.network.ServerPlayNetworkHandler$1.operationComplete(ServerPlayNetworkHandler.java:164)
	at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:680)
	at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:603)
	at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:563)
	at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:406)
	at io.netty.channel.DefaultChannelPromise.trySuccess(DefaultChannelPromise.java:82)
	at io.netty.channel.ChannelOutboundBuffer.safeSuccess(ChannelOutboundBuffer.java:523)
	at io.netty.channel.ChannelOutboundBuffer.remove(ChannelOutboundBuffer.java:247)
	at io.netty.channel.ChannelOutboundBuffer.removeBytes(ChannelOutboundBuffer.java:322)
	at io.netty.channel.epoll.EpollSocketChannel.writeBytesMultiple(EpollSocketChannel.java:212)
	at io.netty.channel.epoll.EpollSocketChannel.doWriteMultiple(EpollSocketChannel.java:364)
	at io.netty.channel.epoll.EpollSocketChannel.doWrite(EpollSocketChannel.java:317)
	at io.netty.channel.AbstractChannel$AbstractUnsafe.flush0(AbstractChannel.java:707)
	at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.epollOutReady(AbstractEpollChannel.java:248)
	at io.netty.channel.epoll.EpollSocketChannel$EpollSocketUnsafe.epollOutReady(EpollSocketChannel.java:623)
	at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:322)
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:264)
	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
	at java.lang.Thread.run(Thread.java:748)