Google Ads: We detected a missing SSL certificate for your website

Hi,
I have recently installed free Cloudflare SSL to my WordPress website and I’m getting this message while connecting WordPress with my google ads account however when I check my website I’m getting the secured sign and it works on https.
“We detected a missing SSL certificate for your website. Please ensure you have a valid SSL certificate and your website contains https:// to continue.”

You didn’t post a domain name for us to check, but you can use this SSL tester:

The domain names is https://coreva.me

It has a certificate, and supports more protocols than necessary.

so, why am I getting this message on google ads account? and how can I fix it?