1) Install Java 17+
Download and install Java 17 or newer, then restart your launcher.
Documentation
Quick setup, configuration, and troubleshooting for IO-Client.
Download and install Java 17 or newer, then restart your launcher.
Use the latest stable build for daily play, or nightly for testing.
Start Minecraft, open the client menu, and confirm modules are loaded.
Create separate profiles for PvP, survival, and testing setups.
Bind frequently used modules to avoid opening the GUI mid-game.
Back up your config before changing versions, especially nightly builds.
Check Java version, graphics drivers, and remove conflicting mods.
Disable heavy modules first, then lower render distance and effects.
Open an issue with logs, game version, and your OS so contributors can help quickly.