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Minecraft Fabric API Missing Dependency Fix

If your Fabric Minecraft crash log says a mod needs Fabric API, the game is usually missing one of the core library files many Fabric mods rely on. The fix is usually simple: install the correct Fabric API file for your Minecraft version.

Quick answer

Download Fabric API for your exact Minecraft version, place the Fabric API .jar file in your mods folder, then relaunch Minecraft. Make sure your modpack is actually using Fabric, not Forge or NeoForge.

What this error means

Fabric API is a shared library used by many Fabric mods. When it is missing, those mods may fail before Minecraft reaches the main menu. This does not always mean the broken mod is bad — it may just be waiting for Fabric API to be installed.

Common signs in the crash log

Mod requires fabric-api
depends on fabric-api
Missing dependency fabric-api
Fabric Loader could not load one or more mods
A mod is missing required dependencies
fabric-api is not installed

How to fix it

1
Check the Minecraft version your Fabric profile uses.
2
Confirm the profile is using Fabric Loader, not Forge or NeoForge.
3
Download Fabric API for that exact Minecraft version.
4
Move the Fabric API .jar file into the same mods folder as your other Fabric mods.
5
Remove duplicate or outdated Fabric API files if you have more than one.
6
Relaunch Minecraft and let it create a fresh log.
7
If it still crashes, load the newest log into FixMyGame.

Make sure the version matches

Fabric API versions are tied to Minecraft versions. A Fabric API file for Minecraft 1.20.1 may not work correctly in a 1.19.2 modpack. Match the Minecraft version first, then check the Fabric Loader version if the crash continues.

Minecraft version must match.
Fabric Loader must be installed.
Fabric API must be a .jar file inside the mods folder.
Forge-only mods should not be mixed into a Fabric profile.

Do not do this yet

Do not delete the mod asking for Fabric API until you install the missing dependency first.
Do not install Forge API or another loader file instead of Fabric API.
Do not use a Fabric API file made for a different Minecraft version.
Do not keep several old Fabric API files in the mods folder.

FixMyGame tip

If FixMyGame says Fabric API is missing but you already installed it, relaunch Minecraft and use the newest crash log. You may be looking at a log from before Fabric API was added.

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