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

"Gesture Layer needs valid mask on first animator layer" - VRChat fix

Quick fix
  1. In the Animator window, open the animator set as Gesture on the Avatar Descriptor
  2. Click the gear icon on the top layer

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What you see on screen:

Gesture Layer needs valid mask on first animator layer

What it means

You replaced the Gesture layer animator (which moves the hands), but its first layer has no hands-only mask.

Common causes

How to fix it

  1. In the Animator window, open the animator set as Gesture on the Avatar Descriptor
  2. Click the gear icon on the top layer
  3. Set Mask to "vrc_HandsOnly" (included in the VRChat SDK)

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

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For this problem, it checks whether the first layer has a mask, and the paid version adds vrc_HandsOnly in one click.
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