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.

If you have come across the Exit Code 1 error on Minecraft that causes the game to crash when loading it, here's what you can do to fix it.

Minecraft players who are using an outdated version of Java will be greeted with this message How can players fix the JNI Error?

Minecraft Internal Exception errors can be frustrating to get rid of if you do not know what to do.