When adding a domain to your Cloudflare account, you may receive the following error message:
This zone cannot be added to Cloudflare at this time, please contact Cloudflare Support. (Code: 1093)
This may happen when you are including a subdomain to the domain, such as:
To resolve this issue, do not include a subdomain. Enter only the domain, such as:
All subdomains are automatically included and managed via Cloudflare DNS once you complete the sign up process.