After five months of no problems nor errors with my Comodo certificate on a personal website suddenly, as of two or three days ago, I'm getting a meddlesome, "Certificate isn't from a trusted authority," error when viewing on my Android mobile. (No errors appear when viewing on desktop, neither when the website is viewed on a friend's iPhone.)
In trying to solve, I'd run ssllabs.com on it. All results green, but for an orange 'DNS CAA' returning 'No'.
Does anyone know what 'DNS CAA' is? I visited Qualys' blog for further information, but didn't fully understand. Plus, it seemed they said those DNS CAA changes happened in 2017, so I also don't understand why I'd suddenly have errors now when it was working before (I'd signed up for the certificate in February 2018). Is this something outside of my control, for Comodo to sort out for themselves?
Second: Could that 'DNS CAA No' be the cause of the Android errors? If so, why might it be throwing only Android, when it all seems to work fine on other platforms?
Website Test Results: https://www.ssllabs.com/ssltest/analyze.html?d=method.moda&latest