@SanSenKen
it looks like the error originates within the VRChat SDK (VRC SDK3A Editor); so if you haven't already try to create a new fresh project with just the necessities in it.
Check the Blueprint ID: If you are using a shared or pre-made avatar project, the avatar might have an existing Pipeline Manager (Script) component with a locked or invalid Blueprint ID.
Select your avatar's main object in the Unity hierarchy.
In the Inspector window, look for the "Pipeline Manager (Script)" component.
Click "Detach" or "Clear Blueprint ID" (if the option is available) and try to upload again, If it is not available hit the three dots on the Pipeline manager(script) for the blueprint id and hit reset.[image: 41760c77-cb00-4e5c-901f-f7772510d4ae-image.png]
Than clear the log and try again <33
