How to Resolve a Missing Dependency Error Involving MixinBooter

Understand the Error Message

A dependency error usually reads something like a mod requiring mixinbooter at a certain range, or a mod refusing to load because a mixin library is absent. This means the mod you want needs MixinBooter present and loadable before it runs. The fix is about load order and presence, not about editing configs.

Confirm Both Mods Are Present

1. Open your mods folder and verify MixinBooter is there alongside the mod throwing the error.

2. Make sure neither file is a duplicate with a different name, which can confuse the loader.

3. Check that the dependent mod's required version range matches the MixinBooter build you have.

Fix Load Order Problems

MixinBooter is designed to load very early, but occasionally another coremod or early library interferes. If the error persists:

• Remove other early-loading libraries temporarily to see if one is blocking MixinBooter.
• Re-add them one by one to find the conflict.
• Avoid renaming mod files, since some loaders key off filenames.

When the Mod Itself Is Outdated

If the dependent mod demands a newer MixinBooter than you have, update MixinBooter to a build within the required range. If it demands an older one, you may need an older dependent mod instead. Never mix builds across major loader versions, as the transformation API can differ.