Yes, so it would seem. Guest access is the only place where there is a confgurable "hostname". Changing the config in cnMaestro to the hosted portal name or using the greyed out hostname (xxxxxd.cloudfront.net) above in the portal config page, for the SSID I want to make the portal, results in that error.
**added: this is the only forum tutorial I could find
The guest portal name is the name of the portal you configured in the 'Name' field after clicking on 'Add Portal' (it is displayed in bold on the Portals page next to the portal icon). The hostname field on the first line (greyed out) is a host you will need in whitelist in your social media app if you're using Facebook / Google login.
Can you advise me about how to change the hostname of the cnmaestro ? I need to create a certificate signing request and I need to update current name cnmaestro.my.domain to something domain compliant.