@aapanel_power Hi, just found this thread. I have exactly the same problem as @diazzaid
Same Cloudflare configuration and same errors.
Edit: I think I found the problem:
Verification works fine for the Zone domain, but not subdomains.
So if a certificate for a subdomain (xxx.mydomain.com) is requested, the Cloudflare Zone should be the main domain (mydomain.com). At the moment I think the Cloudflare integration is trying to use the subdomain as a Zone.