"Your site could not complete a Loopback Request" Error

I am maintaining a Wordpress site and using CloudFlare for better performance. Whereas, whenever I am putting my site on Site Health Check, I am getting the following error -
"Loopback requests are used to run scheduled events, and are also used by the built-in editors for themes and plugins to verify code stability.

The loopback request to your site failed, this means features relying on them are not currently working as expected.
Error: cURL error 28: Operation timed out after 10002 milliseconds with 0 bytes received (http_request_failed)"

This may be an SSL issue with your server. Which SSL mode are you using at Cloudflare for your domain? Is it Flexible, or Full?

same issue im facing and using flexible ssl

It’s possible it’s because your site thinks it’s an HTTPS site, so it tries a local HTTPS connection that fails. Flexible leads to inconsistent behavior.

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