Custom domain - (partial CNAME setup)

Hi,

I want to use a custom domain with my pages app, the issue is I cannot have the nameservers on the CF account they need to be held on a different CF account.

Suggested solution is to use a partial CNAME setup: https://developers.cloudflare.com/dns/zone-setups/partial-setup/setup/

The setup is successful however I am unable to add the www. subdomain. (Step 3)

www.example.com CNAME www.example.com.cdn.cloudflare.net

The following error code is displayed:

DNS Validation Error (Code: 1004) Invalid CNAME target. Cannot use records with partial suffixes.

Anyone have any idea whats happening?
A partial (CNAME) setup allows you to use Cloudflare’s reverse proxy while maintaining your primary and authoritative DNS provider.
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