I and my friend have been playing on his hamachi server for a bit now. I've been busy for the past 2 days so I couldn't play. Today I tried to hop on to play, but I found an error "io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information". We've encountered this error before when trying to set up the server. It's back, but we don't know why. Any help?