We don't host that domain. https://dnschecker.org/#A/dosprn.com If you want to host dosprn.com with us either
Set your NS records to ns1.heliohost.org and ns2.heliohost.org
OR set your A record to 65.19.141.67 and your AAAA record to 2001:470:1:1ee::2009
You don't have to do both, just one or the other. The advantage to option 1 is we can create all the other DNS records for you like MX, SPF, DKIM, DMARC, TXT, etc. if you don't know what you're doing. The advantage to option 2 is you can create all those records without an admin helping you if you're an advanced user and already know how to do all of the DNS stuff.
Once we host that domain you will be able to install SSL on it.