Your website still mentions it is not secure. Even though it has a Lets encrypt certificate and uses https. Could it have something to do with www / non-www ?
First , I could not connect at all, but after I unchecked TLS 1.2 and SSL 3.0, it seemed to workaround. (guided from here: https://www.itexperience.net/2018/11/16/fix-edge-error-cant-connect-securely-page/ )
