I am running WordPress on InfinityFree,and I am using the Really Simple SSL plugin. The plugin has a SSL check powered by Qualys. I ran it, and my score was B. I clicked the button that says “View detailed info on Qualys SSL Labs” button to see more info. I saw the page, and I found that the certificate chain is incomplete.
By the way, in the page, you can see that DNS CAA is marked as No. I wonder if I can enable it, and if I can, how?
Your site TLS health is fine. We just don’t support intermediate certificates here, but most modern OSes (even going back to WinXP!) and browsers can select the root/intermediate certificate(s) necessary for a secure connection, and apparently Qualys doesn’t like this.