ERR_NGROK_SHIP_APP_REPOSITORY_NOT_CONFIGURED: App NAME has no connected repository - ngrok documentation

What does ERR_NGROK_SHIP_APP_REPOSITORY_NOT_CONFIGURED mean?

ngrok returns ERR_NGROK_SHIP_APP_REPOSITORY_NOT_CONFIGURED with this message:

App <NAME> has no connected repository. Connect a GitHub repository before you add a continuous delivery.

Where can I get more help with ERR_NGROK_SHIP_APP_REPOSITORY_NOT_CONFIGURED?

Email support@ngrok.com and include the error code.