Looks like already using Shopify despite DNS records not proxied
server: cloudflare
powered-by: Shopify
Are you using CNAME or A type of the DNS records pointed to the Shopify?
May I ask if you’ve followed the instructions from article below to enable Shopify for your domain at Cloudflare?
Helpful:
O2O will work automatically on proxied CNAMEs anyway so doesn’t need to be enabled by Cloudflare manually. Just ensure you are using your provider’s CNAME and not A/AAAA records.
If you’re still getting that error, please share a screenshot, and we’ll be happy to re-check.