# Error when trying to build avatar **URL:** \ **Category:** Help!\ **Created:** [June 29, 2026, 7:06pm UTC](https://ask.vrchat.com/t/error-when-trying-to-build-avatar/48641 "2026-06-29T19:06:05Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![MerkiTheSpirit](https://yyz1.discourse-cdn.com/vrchat/user_avatar/ask.vrchat.com/merkithespirit/32/46794_2.png) [@MerkiTheSpirit](https://ask.vrchat.com/u/MerkiTheSpirit)\ **Post date:** [June 29, 2026, 7:06pm UTC](https://ask.vrchat.com/t/error-when-trying-to-build-avatar/48641/1 "2026-06-29T19:06:05Z")
Whenever I try to build I get this error: Avatar validation failed UnityEngine.Logger:Log (UnityEngine.LogType,object,UnityEngine.Object) (wrapper dynamic-method) UnityEngine.Debug:UnityEngine.Debug.LogError\_Patch1 (object,UnityEngine.Object) VRC.Core.Logger:LogError (string,string,UnityEngine.Object) VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d\_\_152:MoveNext () (at ./Packages/com.vrchat.avatars/Editor/VRCSDK/SDK3A/VRCSdkControlPanelAvatarBuilder.cs:3309) System.Runtime.CompilerServices.AsyncVoidMethodBuilder:Start\ (VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d\_\_152&) VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder:BuildError (object,string) VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d\_\_143:MoveNext () (at ./Packages/com.vrchat.avatars/Editor/VRCSDK/SDK3A/VRCSdkControlPanelAvatarBuilder.cs:2989) System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1\:Start\ (VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d\_\_143&) VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder:HandleBuildError (System.Exception) VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d\_\_141:MoveNext () (at ./Packages/com.vrchat.avatars/Editor/VRCSDK/SDK3A/VRCSdkControlPanelAvatarBuilder.cs:2874) UnityEngine.UnitySynchronizationContext:ExecuteTasks () PLEASE HELP!!! ---
**Author:** ![docteh](https://yyz1.discourse-cdn.com/vrchat/user_avatar/ask.vrchat.com/docteh/32/12171_2.png) [@docteh](https://ask.vrchat.com/u/docteh)\ **Post date:** [June 29, 2026, 11:04pm UTC](https://ask.vrchat.com/t/error-when-trying-to-build-avatar/48641/2 "2026-06-29T23:04:25Z")
> [@MerkiTheSpirit](#): > > Avatar validation failed Check any message in the log earlier than this one. Warnings, info, error, spam offers (joke) Something will be in there. Maybe you’re using a shader on a quest avatar that’s not supported? ---
**Author:** ![MerkiTheSpirit](https://yyz1.discourse-cdn.com/vrchat/user_avatar/ask.vrchat.com/merkithespirit/32/46794_2.png) [@MerkiTheSpirit](https://ask.vrchat.com/u/MerkiTheSpirit)\ **Post date:** [June 30, 2026, 3:17pm UTC](https://ask.vrchat.com/t/error-when-trying-to-build-avatar/48641/3 "2026-06-30T15:17:46Z")
![Screenshot 2026-06-30 111643](https://global.discourse-cdn.com/vrchat/original/3X/c/b/cb781ff2318c5f4b11c92445bc0546d27ba2bb63.png) ![Screenshot 2026-06-30 111638](https://global.discourse-cdn.com/vrchat/original/3X/d/a/da9d5077851ab92c5fe48e84cd52d4078ac0d967.png) this is all that appears :/ And I am using all mobile shaders ---
**Author:** ![MerkiTheSpirit](https://yyz1.discourse-cdn.com/vrchat/user_avatar/ask.vrchat.com/merkithespirit/32/46794_2.png) [@MerkiTheSpirit](https://ask.vrchat.com/u/MerkiTheSpirit)\ **Post date:** [June 30, 2026, 3:24pm UTC](https://ask.vrchat.com/t/error-when-trying-to-build-avatar/48641/4 "2026-06-30T15:24:11Z")
NEVERMIND! I got it working!!! I didn’t specify the face mesh for visemes!! ---
**Author:** ![WubTheCaptain](https://yyz1.discourse-cdn.com/vrchat/user_avatar/ask.vrchat.com/wubthecaptain/32/43797_2.png) [@WubTheCaptain](https://ask.vrchat.com/u/WubTheCaptain)\ **Post date:** [June 30, 2026, 5:51pm UTC](https://ask.vrchat.com/t/error-when-trying-to-build-avatar/48641/5 "2026-06-30T17:51:49Z")
For future reference, this is an error alert in the VRChat SDK Builder that’s hard to miss. ![image](https://global.discourse-cdn.com/vrchat/original/3X/2/8/280f7d34b778d3e40c26d67a26309b189e6db3cd.png) ---
**Author:** ![WubTheCaptain](https://yyz1.discourse-cdn.com/vrchat/user_avatar/ask.vrchat.com/wubthecaptain/32/43797_2.png) [@WubTheCaptain](https://ask.vrchat.com/u/WubTheCaptain)\ **Post date:** [June 30, 2026, 6:01pm UTC](https://ask.vrchat.com/t/error-when-trying-to-build-avatar/48641/6 "2026-06-30T18:01:15Z")
Tangential off-topic mention: The original avatar [Curse Sonic Plush （Iamjaystation）](https://vrchat.com/home/avatar/avtr_7a394967-36f9-4654-8d79-0260e3ac728d) (`avtr_7a394967-36f9-4654-8d79-0260e3ac728d`) was made by [Goodumb](https://vrchat.com/home/user/usr_689d251f-869e-4cb0-9a14-817dc4d58306), ripped from VRChat and shared by someone, and this ripped copy ended up in OP’s hands somehow (`prefab-id-v1_avtr_7a394967-36f9-4654-8d79-0260e3ac728d`).