Client and Server crash

Hi, everytime while im joining my server my client crash and now same with server

22.02 19:31:03 [Disconnect] User Ewwe has disconnected, reason: Internal Exception: io.netty.channel.unix.Errors$NativeIoException: syscall:read(..) failed: Connection reset by peer

Its really annoying...

I tryed several JAVA instalations and reinstal MC and windows...