Error 1016: Origin DNS error
Common cause
Cloudflare cannot resolve the origin web server’s IP address.
Common causes for Error 1016 are:
A missing DNS A record that mentions the origin IP address.
A CNAME record in Cloudflare DNS points to an unresolvable external domain.
The origin host names (CNAMEs) in your Cloudflare Load Balancer default, region, and fallback pools are unresolvable. Use a fallback pool configured with an origin IP as a backup in case all other pools are unavailable.
Resolution
To resolve error 1016:
Verify your Cloudflare DNS settings include an A record that points to a valid IP address that resolves via a DNS lookup tool.
For a CNAME record pointing to a different domain, ensure that the target domain resolves via a DNS lookup tool.