A test authorization for stage.simplefatfix.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://stage.simplefatfix.com/.well-known/acme-challenge/jvw0kydO_Rh2m7qCZ3C7rePIZJz7wpwsZitALcz8850: Timeout during connect (likely firewall problem)