ello, I have an issue with unity where I can’t upload an avatar made by a creator. It keeps showing me these errors and I don’t know how to fix it at all. At first it was the Blueprint id which somehow i managed to upload one of the avis. But now that i want to edit it just won’t work anymore. Now i…

Per Rig Requirements , you need a chest bone mapped to a humanoid rig for VRChat, even while it’s shown (incorrectly) as optional in Unity Editor.

[image] it still keeps giving me those errors even after I fixed the chest

Make sure you are using VRChat SDK 3.9.0 or later.

nevermind i managed to somehow fix it and it worked, but thanks regardless for this extra helpful thing!

how’d you manage to fix it???

Avatar Validation failed- Send help

WubTheCaptain March 8, 2026, 1:56pm 2

Spine hierarchy missing elements, please map: Chest

What does your skeleton rig look like for the FBX?

Here’s a valid humanoid rig:

Topic		Replies	Views
Humanoid bone rig shows chest is optional but won't let me upload without it? Avatars avatar , bug	1	149	January 14, 2026
Camera swinging and avatar in the air Help! avatar , bug	4	121	January 21, 2026
[HELP] Avatars camera sways like a swing and avatar wont pop up Help! avatar , bug , vrchat	4	685	January 2, 2025
Im trying to create my roblox avatar into vrchat and its saying the the rig isnt humanoid please help Help! vrchat	1	1136	May 25, 2024
Avatar configuration keeps on resetting after applying changes Help! avatar	8	385	March 4, 2026