[Domain Mapping] Domain Mapping wont work

I keep getting this error when I try to map…"Domain name is unavailable to access

We can’t access your new domain. Mapping a new domains can take as little as 15 minutes to resolve but in some cases can take up to 72 hours, so please wait if you just bought it. If it is an existing domain and has already been fully propagated, check your DNS records are configured correctly"