I have the same problem with Digital Ocean droplet “WARNING: Port 443”. It is [diskusia.ucto.info] and it is pointed to the IP of the droplet 46.101.190.207 There is no CDN with the hosting hostarmada between the DNS and the droplet. But it cannot be installed becasue of the port 443. I was traying also other domain registered with other provider, but there is the same error.