Domain Mapping Error

So I have tried mapping a domain name to one of my subdomains on my multisite network. It gives me the error of above.

I have tried the following troubleshooting steps: Looked up the DNS A record to make sure it is correct (http://viewdns.info/dnsrecord/?domain=blakewhittle.com)

I have disabled the check health and it just renders the whole site unusable (even going to the subdomain)