The VRCSDK build was aborted because the VRCSDKPreprocessAvatarCallback 'AvatarBuildHook' reported a failure.

[Curiosa-07]

You cannot upload your avatar. I am getting the following error and my Unity version is 2022.3.6f1. Does this version not work yet?

Refreshing native plugins compatible for Editor in 10.61 ms, found 4 plugins. Preloading 2 native plugins for Editor in 0.09 ms. Asset Pipeline Refresh (id=fbcd2e44ca5170841a6860d459e9a2c7): Total: 0.109 seconds - Initiated by StopAssetImportingV2(NoUpdateAssetOptions) Start importing Packages/d4rkpl4y3r.d4rkavataroptimizer/TrashBin using Guid(b64dde50c31b8c64cac61625fa80562a) Importer(-1,00000000000000000000000000000000) -> (artifact id: 'a205be73cc644c11893863d0f56fef37') in 0.003109 seconds Refreshing native plugins compatible for Editor in 10.86 ms, found 4 plugins. Preloading 2 native plugins for Editor in 0.09 ms. Asset Pipeline Refresh (id=069be3bf6d765da4eb989bbcfc66d4c8): Total: 0.113 seconds - Initiated by StopAssetImportingV2(NoUpdateAssetOptions) System.InvalidOperationException: Avatar is null. at UnityEngine.Animator.GetBoneTransform (UnityEngine.HumanBodyBones humanBoneId) [0x00011] in <9802f153e66043958995cd88a8668a6e>:0 at d4rkAvatarOptimizer.FindAllMovingTransforms () [0x00238] in .\Packages\d4rkpl4y3r.d4rkavataroptimizer\Editor\d4rkAvatarOptimizer.cs:2291 at d4rkAvatarOptimizer.FindAllUnmovingTransforms () [0x00029] in .\Packages\d4rkpl4y3r.d4rkavataroptimizer\Editor\d4rkAvatarOptimizer.cs:2346 at d4rkAvatarOptimizer.FindMovingParent () [0x00000] in .\Packages\d4rkpl4y3r.d4rkavataroptimizer\Editor\d4rkAvatarOptimizer.cs:3425 at d4rkAvatarOptimizer.CombineSkinnedMeshes () [0x0003b] in .\Packages\d4rkpl4y3r.d4rkavataroptimizer\Editor\d4rkAvatarOptimizer.cs:3444 at d4rkAvatarOptimizer.Optimize () [0x00184] in .\Packages\d4rkpl4y3r.d4rkavataroptimizer\Editor\d4rkAvatarOptimizer.cs:149 at d4rkpl4y3r.AvatarOptimizer.AvatarBuildHook.OnPreprocessAvatar (UnityEngine.GameObject avatarGameObject) [0x00045] in .\Packages\d4rkpl4y3r.d4rkavataroptimizer\Editor\AvatarBuildHook.cs:37 UnityEngine.StackTraceUtility:ExtractStackTrace () UnityEngine.DebugLogHandler:LogFormat (UnityEngine.LogType,UnityEngine.Object,string,object[]) UnityEngine.Logger:Log (UnityEngine.LogType,object) UnityEngine.Debug:LogError (object) d4rkpl4y3r.AvatarOptimizer.AvatarBuildHook:OnPreprocessAvatar (UnityEngine.GameObject) (at ./Packages/d4rkpl4y3r.d4rkavataroptimizer/Editor/AvatarBuildHook.cs:42) VRC.SDKBase.Editor.BuildPipeline.VRCBuildPipelineCallbacks:OnPreprocessAvatar (UnityEngine.GameObject) VRC.SDK3.Builder.VRCAvatarBuilder:ExportCurrentAvatarResource (UnityEngine.Object,bool,bool,string&,System.Action1<string>,System.Action1

[d4rkc0d3r]

Same issue as https://github.com/d4rkc0d3r/d4rkAvatarOptimizer/issues/65

There is an extra animator somewhere on your avatar. If you remove it it will work. Otherwise the bug is new in unity 2022 and will be fixed whenever I finish the next release.