It looks like you need to add the compute.imageUser role to your credentials: None

Did you by any chance set up the autoscaler to use a custom image? It's trying to use ‘projects/image-processing/global/images/image-for-clearml’ which is a path I don't recognise. Is this your own, custom image? If so, we can add this role to the documentation as required when using a custom image 🙂