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Common troubleshooting

  1. Confirm that the JAR is in the active game directory’s mods folder.
  2. Confirm that the file targets Fabric, Forge, or NeoForge as appropriate.
  3. Confirm that the Minecraft version is inside the file’s supported range.
  4. Read latest.log and find the first error associated with the mod ID.

Mods that use Simple GUI API need its build for the same Minecraft version and loader. Mod Menu is an optional Fabric entry point to settings, not a replacement for required dependencies.

Check Minecraft’s key binding screen for conflicts and close chat or other GUIs before testing. If you changed a binding, the value displayed in game takes precedence over the default documented here.

Reproduce the issue in a new game directory containing only the target mod, its required dependencies, and the loader. Do not change a normal play environment or an existing world directly; use a copy or a test world.