The error code DNS_PROBE_FINSHED_NXDOMAIN means that the domain doesn’t exist, the domain may not be registered or DNS records haven’t be changed (or the change hasn’t been registered, that can take up to 48 hours) for more help visit: Cloudflare Help Center
We were given this data and was informed by those whom we registered the domain with to contact cloudflare, when we asked why we were receiving this error message.
The domain is there all right, but you haven’t set up any DNS records. Check out https://dash.cloudflare.com/?to=/:account/:zone/dns and make sure that all necessary records are in place. If you are not sure which ones should be there, contact your host. Cloudflare can’t tell you that.
Sure, that would be a brand-new setup and you’d just need to follow the standard setup procedures explained at support.cloudflare.com. You’ll still have to enter your DNS records manually as there is nothing to to take them from right now. It might be best to move your domain first back to your actual host.
As I mentioned earlier I’d probably move the whole domain back to the host and then - should you still want to use Cloudflare - set it up from scratch.
I’d also talk to person who originally set that up, otherwise you’ll be mostly guessing.