Can someone pls help me i need to find out how to fix this error i hope some kind soul finds this post

So i only get this error when i try to upload it Error while saving Prefab: ‘Assets/prefab-id-v1_avtr_3e71678a-8eaf-4843-bc5f-5fdcddc0fef0_8085049350.prefab’. You are trying to save a Prefab with a missing script. This is not allowed.
Please change the script or remove it from the GameObject ‘Armature’.
UnityEditor.PrefabUtility:SaveAsPrefabAsset (UnityEngine.GameObject,string)
VRC.SDK3.Builder.VRCAvatarBuilder:ExportCurrentAvatarResource (UnityEngine.Object,bool,bool,string&,System.Action1<string>,System.Action1)
VRC.SDK3.Builder.VRCAvatarBuilder:ExportAvatarBlueprint (UnityEngine.GameObject)
VRC.SDK3A.Editor.VRCSdkControlPanelAvatarBuilder/d__141:MoveNext () (at ./Packages/com.vrchat.avatars/Editor/VRCSDK/SDK3A/VRCSdkControlPanelAvatarBuilder.cs:2806)
UnityEngine.UnitySynchronizationContext:ExecuteTasks ()

Does anybody out there know how i can Fix this pls hit me up on Discord: Ziegeltron

You have either

a) not imported all dependencies (VPM packages in VCC)

or

b) You have deleted a file that had a script

Check that you have added all required packages (per instructions from the creator) and contact the creator of the Avatar you are trying to upload if you can’t figure it out.

Maybe your sdk is confused. Open the vrchat sdk tab on unity and use the reload sdk option, see if it fixes it.

So, best bet would be to check the avatar listing, see if it mentions needing something like VRCFury, or Modular Avatar

In the past the most common missing script was Dynamic Bones, the predecessor to Physbones. But since its attached to the Armature, its not that. you could go find the object under the avatar and remove the missing script. Unity doesn’t really give a good way to say what script is missing.