Could not check

Could not check means the attempt was made and nothing usable came back. The app timed out, the host refused the connection, the certificate could not be completed, or the address did not resolve.

It is deliberately not folded into a pass or a fail. An item that failed to load is not an item that passed, and it is not evidence of a problem either. Reporting it as either one would be a small lie that makes the rest of the document less trustworthy.

Usually it means the app was asleep, the URL had a typo, or a firewall stopped an unfamiliar client. Run the check again when the app answers from the public internet and the item resolves to a real result.

• Plain http traffic is sent on to https

No incident in the library maps to this one yet.