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.

Hello. I've been getting this issue when just exploring my minecraft server. I dont do anything to make this trigger but I may have a suspicion that its my WiFi. After a couple of hours of research ...

Bug Report Hello. Me and my wife have a problem with minecraft 1.12.2 forge server with mods. We want to play together SevTech Ages modpack, everything went smoothly to the moment of connection to ...

To fix the Io.netty.channel.AbstractChannel $AnnotatedConnectException: Connection timed out error, check your firewall's allowed app settings for Java.