How to Fix Missing Mod Dependencies in Minecraft

The Error

Missing or unsupported mandatory dependencies:
  Mod 'create' (create) requires version [0.5+] of mod 'flywheel' (flywheel), but none was found!

net.fabricmc.loader.impl.FormattedException:
  Mod 'sodium-extra' requires mod 'fabric-api' version 0.92.0+, but only 0.91.0 was found.

Most mods do not work alone. They require library mods (APIs, frameworks, rendering engines) that provide shared functionality. When a required library is missing or the wrong version is installed, the mod loader refuses to start and lists the missing dependencies.

Quick Fix

Read the error message. It names the missing mod and the required version. Download it from Modrinth or CurseForge and place the .jar file in your mods/ folder.

Step-by-Step Diagnosis

1. Read the error carefully. The mod loader tells you exactly what is missing: the mod ID, the required version, and which mod needs it. This is the most helpful error message in Minecraft modding.
2. Search for the dependency. Go to Modrinth or CurseForge and search for the mod ID listed in the error. Download the version that matches your Minecraft version and mod loader.
3. Match the version range. If the error says "requires version [0.5+]", you need version 0.5 or higher. Download the latest version for your Minecraft version, which will almost always satisfy the requirement.
4. Place the .jar in the mods folder. Drop the downloaded dependency into .minecraft/mods/ alongside the mod that requires it.
5. Check for transitive dependencies. Some dependencies have their own dependencies. After adding one library, start the game again. If another dependency error appears, repeat the process.
6. Verify the mod loader type. A Forge dependency does not work on Fabric and vice versa. Make sure you download the correct version for your mod loader.

Common Dependencies by Mod Loader

Fabric

• Fabric API - Required by nearly every Fabric mod. Always install it.
• Cloth Config - Configuration screen library. Required by many popular mods.
• Mod Menu - Not a hard dependency, but needed to access mod config screens in-game.
• Architectury API - Cross-loader library used by mods that support both Forge and Fabric.

Forge / NeoForge

• GeckoLib - Animation library for mods with custom entity models.
• Flywheel - Rendering engine used by Create and other mods.
• Architectury API - Cross-loader compatibility layer.
• Curios API - Equipment slot library for accessory mods.

Common Causes

• Forgot to install Fabric API. The most common dependency error on Fabric. Fabric API is separate from Fabric Loader and must be downloaded and installed manually.
• Outdated dependency. You have the dependency but it is too old. Update it to the version required by the error message.
• Downloaded for the wrong loader. A Forge version of Architectury does not satisfy a Fabric mod's requirement. Always match the mod loader.
• Modpack missing files. If you manually installed a modpack, some dependency jars may have been missed. Compare your mods folder to the modpack's official file list.

FAQ

How do I know what dependencies a mod needs before installing?

The mod's page on Modrinth or CurseForge lists its dependencies under a "Dependencies" or "Relations" section. Required dependencies are marked as mandatory.

Can I use an older version of a dependency?

Only if it falls within the version range specified by the error. If the mod requires "version [2.0, 3.0)", versions 2.0 through 2.x work, but 1.x and 3.0+ do not.

Why do mods have so many dependencies?

Library mods prevent code duplication. Instead of every mod writing its own config system, they all use Cloth Config. This reduces mod size, memory usage, and maintenance work for developers.

What happens if I install a dependency for the wrong Minecraft version?

The mod loader detects the version mismatch and shows another error. You must match the dependency's Minecraft version, mod loader, and sometimes even the specific build number. Always download from the dependency's official page and filter by your exact Minecraft version.

Automating Dependency Management

Manually tracking dependencies becomes difficult with 50+ mods. These tools help:

• Prism Launcher: When you add a mod through the built-in search, it automatically downloads required dependencies. This is the easiest way to avoid missing dependency errors.
• Modrinth App: Handles dependency resolution automatically when installing mods through its interface.
• Packwiz: A command-line tool for modpack management that resolves and downloads dependencies as part of the pack build process.
• CurseForge App: Prompts you to install required dependencies when adding a mod to a profile.

If you download mods manually (directly from websites), you are responsible for reading the dependency list and installing each one. This is the most common way to end up with missing dependency errors.

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