VRChat Avatar Error Guide日本語Free tool
VRChat Avatar Error Guide

Modular Avatar (nadena.dev) errors in VRChat - missing or wrong version

Quick fix
  1. Add Modular Avatar in VCC/ALCOM, or update it to the latest version
  2. If the outfit's readme names a specific version, match it

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What you see on screen:

nadena.dev.modular_avatar … / ModularAvatar …

What it means

Modular Avatar - the tool most outfits and gimmicks rely on - is missing or the wrong version.

Common causes

How to fix it

  1. Add Modular Avatar in VCC/ALCOM, or update it to the latest version
  2. If the outfit's readme names a specific version, match it
  3. Reopen Unity and Clear the Console

Before you change anything, make a full copy of your project folder so you can go back.

Fix this automaticallyAvatar Setup Doctor adds a window to Unity. Press Diagnose and it lists what's wrong with your avatar project, why, and how to fix it - the paid version fixes many issues in one click. Free version available.
For this problem, it checks whether Modular Avatar is installed.
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