Help callback failed

The VRCSDK build was aborted because the VRCSDKPreprocessAvatarCallback ‘LockMaterialsOnUpload’ reported a failure.

Failed to build the Avatar, check logs for more details
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__143:MoveNext () (at ./Packages/com.vrchat.avatars/Editor/VRCSDK/SDK3A/VRCSdkControlPanelAvatarBuilder.cs:2920)
System.Runtime.CompilerServices.AsyncVoidMethodBuilder:Start<VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d__143> (VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d__143&)
VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder:BuildError (object,string)
VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d__135:MoveNext () (at ./Packages/com.vrchat.avatars/Editor/VRCSDK/SDK3A/VRCSdkControlPanelAvatarBuilder.cs:2672)
System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1<System.Exception>:Start<VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d__135> (VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d__135&)
VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder:HandleBuildError (System.Exception)
VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d__133:MoveNext () (at ./Packages/com.vrchat.avatars/Editor/VRCSDK/SDK3A/VRCSdkControlPanelAvatarBuilder.cs:2647)
UnityEngine.UnitySynchronizationContext:ExecuteTasks ()

Loaded data for an avatar we do not own, clearing blueprint ID
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:ClearAvatarData (VRC.Core.PipelineManager) (at ./Packages/com.vrchat.avatars/Editor/VRCSDK/SDK3A/VRCSdkControlPanelAvatarBuilder.cs:1677)
VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d__98:MoveNext () (at ./Packages/com.vrchat.avatars/Editor/VRCSDK/SDK3A/VRCSdkControlPanelAvatarBuilder.cs:1556)
System.Runtime.CompilerServices.AsyncTaskMethodBuilder1<VRC.SDKBase.Editor.Api.VRCAvatar>:SetException (System.Exception) VRC.SDKBase.Editor.Api.VRCApi/<GetAvatar>d__31:MoveNext () (at ./Packages/com.vrchat.base/Editor/VRCSDK/Dependencies/VRChat/API/VRCApi.cs:575) System.Runtime.CompilerServices.AsyncTaskMethodBuilder1<VRC.SDKBase.Editor.Api.VRCAvatar>:SetException (System.Exception)
VRC.SDKBase.Editor.Api.VRCApi/d__171<VRC.SDKBase.Editor.Api.VRCAvatar>:MoveNext () (at ./Packages/com.vrchat.base/Editor/VRCSDK/Dependencies/VRChat/API/VRCApi.cs:378) System.Runtime.CompilerServices.AsyncTaskMethodBuilder1<VRC.SDKBase.Editor.Api.VRCAvatar>:SetException (System.Exception)
VRC.SDKBase.Editor.Api.VRCApi/d__162<object, VRC.SDKBase.Editor.Api.VRCAvatar>:MoveNext () (at ./Packages/com.vrchat.base/Editor/VRCSDK/Dependencies/VRChat/API/VRCApi.cs:341) System.Runtime.CompilerServices.AsyncTaskMethodBuilder1<System.ValueTuple2<VRC.SDKBase.Editor.Api.VRCAvatar, System.Net.Http.HttpResponseMessage>>:SetException (System.Exception) VRC.SDKBase.Editor.Api.VRCApi/<MakeRequestWithResponse>d__152<object, VRC.SDKBase.Editor.Api.VRCAvatar>:MoveNext () (at ./Packages/com.vrchat.base/Editor/VRCSDK/Dependencies/VRChat/API/VRCApi.cs:332)
UnityEngine.UnitySynchronizationContext:ExecuteTasks ()