Getting Origin DNS error

I added new domain to partner cloudfalre using API, but the website not working it gives error related to the DNS.
I’m using WHMCS
I checked the DNS settings using
A record pointed to cloudflare
NS using a random cloudfalre nameservers ( it is different than that was added in the domain registerer )
The error screenshot

Your site is working for me. Origin DNS error is if you use an incorrect IP address for your “A” record.

So, either you’ve fixed the problem, or you have more than one “A” record in your Cloudflare DNS page for

You also do not have a DNS record for ‘www’, which would be helpful. Here’s an easy way to set one up that works: