Existng Cloudflare nameservers have changed

[alansheers]

What is the name of the domain?

shedwards.uk

What is the error number?

invalid nameservers

What is the error message?

Invalid Nameservers

What is the issue you’re encountering

I cannot change my nameservers from your original ones to new ones supplied by you!!

What steps have you taken to resolve the issue?

looked all over website

What feature, service or problem is this related to?

Nameservers

[sjr]

The domain is active on Cloudflare so likely you are not in the correct Cloudflare account where the domain is registered and have instead added your domain to another Cloudflare account, see…
https://cf.sjr.dev/tools/check?f74ab8cc2c99443fbed108eb757c8820#dns

You will need to log into the account where the domain is active. If you do not see the domain listed here, then you are in the wrong account…
https://dash.cloudflare.com/?to=/:account/domains

Check for emails from Cloudflare from when you registered the domain. Or log out of the dashboard and use “Forgot your email” or check for emails from Cloudflare for your domain registration to locate the login for the account where the domain is registered and active. You may have registered the domain using a Google or iCloud login.