Identify which fake loader version you need

Reading the error message

When you launch Minecraft with mismatched loader versions, the game will show an error screen before the main menu loads. This screen tells you exactly which loader version is required.

Look for text that says something like "requires loader version X.X.X" or "loader version mismatch." Write down this exact version number — you'll need it to pick the right mod file.

Finding your current loader

If you're unsure what loader you actually have installed, check your mods folder or launcher settings. The error screen will compare your installed version against what the mod is asking for. The difference between these two numbers is what the fake loader mod needs to bridge.

Don't guess or use a "close enough" version. The fake loader mod works by reporting a specific version number, so it must match exactly what the error message demands. Take a screenshot of the error if you need to reference it while selecting your mod file.