Hello @vander
Since Hugo v.0.77.0 one can use ignoreErrors = ["error-remote-getjson"] in the project’s config.
Either your local fork of Hugo Docs is older than November the 2nd. In which case I would suggest that you make a hard reset of your local fork to the remote origin and then pull the latest changes.
OR
The Hugo version that you use on Amplify is lower than Hugo 0.77.0
Also see the Requesting Help topic, it contains some useful tips for beginners.