Fix #2: Check for game updates. Keeping your Minecraft game updated is another basic stuff that may help fix “Internal Exception Java.IO.IOException” error.

As many fans are aware, Minecraft Caves & Cliffs update was recently released. This highly anticipated update contained a myriad of new features, including new mobs, blocks, items, and achievements.

Minecraft Error Code 1 in the Java Edition results from various issues like insufficient RAM, corrupted game files, and outdated drivers. Players can fix this error through multiple steps.

Exists: File What to do when Minecraft says failed to download file? If Minecraft is failing to download files at the time of launch, you can try the solutions mentioned to resolve the issue.