ERR_NGROK_SHIP_ROLLBACK_DEPLOYMENT_NOT_FOUND: No deployment with the ID ID exists in this environment - ngrok documentation

What does ERR_NGROK_SHIP_ROLLBACK_DEPLOYMENT_NOT_FOUND mean?

ngrok returns ERR_NGROK_SHIP_ROLLBACK_DEPLOYMENT_NOT_FOUND with this message:

No deployment with the ID <ID> exists in this environment.

Where can I get more help with ERR_NGROK_SHIP_ROLLBACK_DEPLOYMENT_NOT_FOUND?

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