Troubleshooting Startup Crashes Caused by Missing CoroUtil

A common issue when building custom mod setups is encountering startup crashes or error screens stating that a required library is missing. If you install an add-on that relies on this utility without adding the core file, the game cannot launch.

Diagnosing the Loading Error

When launching the game, the mod loader scans all files in your mods folder. If a dependent mod requests code from coroai, buildmod, configmod, or extendedrenderer and cannot find the core file, the game will halt. You will typically see an error screen naming the missing dependency before the main menu even appears.

Steps to Resolve the Crash

1. Check Your Mod Folder: Open your .minecraft directory and inspect the mods folder. Verify that the library file is physically present alongside your other mods.

2. Verify File Presence on Server: If the crash occurs when joining or hosting a server, check the server's mods directory to confirm the utility is present there as well.

3. Do Not Rename Internal Modules: The four bundled sub-mods (coroai, buildmod, configmod, and extendedrenderer) are pre-packaged. Never attempt to unpack or split the file manually.

4. Relaunch the Game: Once the utility is verified in your mods folder, restart your launcher and boot the game.