Cannot use CloudFlare

When I try to add SSL with CloudFlare to my site, I get:

CLOUDFLARE ERROR : We were unable to identify <insert my site name here>.ezyro.com as a registered domain. Please ensure you are providing the root domain and not any subdomains (e.g., example.com, not subdomain.example.com)

I can't see how we are suppost to do this because ya'll only give out subdomains (subdomain.maindomain.com) and not domains (maindomain,com). Any help?

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