The domain is registered but we are trying to add the site to Cloudflare but we are getting a message saying it is unregistered.
It has the default nameservers for the domain provider which comes up in a whois search but Cloudflare won’t add it.
I can see from the provided screenshot it’s registered today.
I would give it a day, due to the SOA records and DNS propagation time and then retry to add the domain name to your Cloudflare account again.
There seems to be an issue or it could be an issue.
When I checked, I found a DNSSEC is enabled and one DS record is being presented.
DNSSEC should always be completely disabled when changing name servers.
Before you change your domain nameservers to Cloudflare (which you will be provided in the process of adding your domain name to your Cloudflare account), please keep in mind to ask your current domain registrar to disable DNSSEC and remove any of the existing DS record.
For this change you might have to wait for next 24 hours.
Nevertheless, a second possible issue while checking the WHOIS information for your domain name. Check below link for more information about your domain status:
We had Cloudflare connected before but the owner cancelled the domain and have now renewed it.
We then put it back to the original name servers to break the connection and reset things.
We can’t add the name servers to Cloudflare as we can’t get past the registeration page.