Elle here from Shopify!
Can you share your store's URL? This way, members of our community will be able to inspect your store, help you determine the error, and also give you additional feedback on how to improve your store's loading time.
@Paul_West It's hard to tell. But, I found below post about this cloudflare stuff. Doesn't look good. Either Debut has this by default or some app I installed injected it. And I can't find where it is in the theme files.