Kenforcer

So I started a new pixelmon server with some friends today and everything was fine for like 5 hours, but since when i came back playing like an hour ago, i keep getting randomly kicked from the server. It says ""Internal Exception: java.io.IOExpection: An existing connection was forcibly closed by the remote host"". Meanwhile the server and my friend is completely fine. I dont think my internet is the problem cause I'm on discord and I'm not lagging at all, but just correct me if I'm wrong. Any fixes?