Error when "./discourse rebuild app" due to theme error

No luck. I could not enter or start the app using command ./launcher start app OR ./launcher enter app

It gives out this error

Unable to find image 'local_discourse/app:latest' locally

docker: Error response from daemon: pull access denied for local_discourse/app, repository does not exist or may require 'docker login': denied: requested access to the resource is denied.

See 'docker run --help'.