"TKLAPP.com The site you are looking for is currently not available. What is TKLAPP.com? it's a free dynamic DNS (DynDNS) service provided by the TurnKey Hub. It includes a simple to use web interface as well as a powerful API."hubdns-info and hubdns-update show the correct hostname and IP address (both match that listed in the Hub dashboard). A "hubdns-init --force" does not fix it.
However, eventually, after between 30 minutes and a few hours - today it took about three hours - the hostname *does* start resolving again. I would be grateful for any advice as to what isn't working quite as it should be here, as a few hours is a bit too long for DNS propagation for my liking.