Support for cloudflare.com
At this time Order Lookup is not supported on shops that proxy requests via cloudflare.com.
The security model of Shopify and Cloudflare prevent 3rd party apps, like Order Lookup, from being embedded directly in sites.
As a solution, you may consider to discontinue the use of Cloudflare.com as a DNS proxy.
Please contact our support team if you have any questions - firstname.lastname@example.org