A Cloudflare Error 1018 indicates that a domain’s registrar nameservers point to Cloudflare, but the domain is not currently active in any Cloudflare account.
Common causes
The domain’s nameservers at its domain registrar are delegated to Cloudflare, but the domain has been deleted from its Cloudflare account, has not completed activation, or was deactivated.
Resolution
If you are not the website owner
The domain is pointing to Cloudflare nameservers without an active website behind it.
If you are the website owner
- Log into your Cloudflare account and add the domain back to your account.
- If you intended to cancel Cloudflare, log into your domain registrar (e.g. GoDaddy, Namecheap) and change the nameservers away from Cloudflare back to your web host’s nameservers.
Source: Cloudflare Documentation - Troubleshooting Cloudflare 1XXX errors (Error 1018)