The Internal Exception Java.IO.IOException error usually occurs when you launch Minecraft, or when the game is underway. This error can be caused by a number of different things.

Potential fixes for Minecraft "Io.Netty.Channel.Abstractchannel Annotatedconnectexception Error" It is crucial to first identify whether the connection issues are coming from the Minecraft server.

Update Java If you’re using the Java edition of Minecraft, an outdated version of Java can also cause problems with not just gameplay but server connections as well. Check to make sure you’re on the ...

To fix Internal Exception: java.io.IOException, An existing connection was forcibly closed by the remote host Minecraft error, you need to follow the given solutions.