SSL Protocol Error

I purchased a membership and connected my domain to the website, but when I try to access the site without adding “www” at the beginning, I get an SSL Protocol error. Can you help me find a solution? Is the problem caused by Ghost or my domain?

Your certificate is issued to ‘www.darkfreeze.com’ - it is not valid for ‘darkfreeze.com’ - you can check these details by looking at the certificate used to secure your connection in your browser.

It is possible to obtain wildcard certificates - but they generally cost more and few other than corporates bother.