When I edit my appengine-web.xml file to include the requisite settings to deploy my app engine app as a managed vm (via Eclipse or gcloud), and then try to upload it, I get this error:
App Engine service account has insufficient permissions for project. Developer or owner required.
I am logged in as the owner when I get this error. Uploading as a non-Managed VM (normal App Engine sandbox) works just fine. If anybody has any suggestions of things to try it would be much appreciated!
You might have accidentally deleted the app-engine service-account from the permissions tab, try adding editor permissions to "your-app-id@appspot.gserviceaccount.com".
Hope It helps!