What is a 1014 Error?

A 1014 CNAME Cross-User Banned error is a Cloudflare-specific error code for: "The domain's CNAME alias points to another Cloudflare domain without cross-user authorization.".

How do I fix or troubleshoot a 1014 Error?

Common steps include reloading the page in your browser, checking for typos in the URL, verifying server status, clearing browser cache or cookies, and contacting the website owner or server administrator if the error persists.

1014 Error | Error-Message.Net

Common cause

A domain’s DNS configuration includes a CNAME record that points to a target domain managed in a different Cloudflare account that has not been configured to permit cross-user proxying.

By default, Cloudflare prohibits CNAME aliasing across different Cloudflare accounts for security reasons, unless the target domain uses Cloudflare for SaaS (Custom Hostnames).

Resolution:

If you are not the website owner:

Contact the service provider hosting the website to report Error 1014.

If you are the website owner:

If you are pointing your domain to a SaaS provider (like HubSpot, Shopify, or ClickFunnels) that uses Cloudflare, ensure you have completed the SaaS verification steps so your custom hostname is registered in their Cloudflare for SaaS account.
Alternatively, if both domains belong to you, move them into the same Cloudflare account.

Source: Cloudflare Documentation - Troubleshooting Cloudflare 1XXX errors (Error 1014)