www.healthplex.com does not appear to have the required intermediate certificate set up, which is causing errors on our side. You can validate this via DigiCert's diagnostic tools at https://www.digicert.com/help/ and type in www.healthplex.com to reproduce.

Another useful diagnostic page is https://observatory.mozilla.org/analyze/www.healthplex.com#tls
which mimics the errors we observe.

Please let us know if you have any questions.

Regards,

Scott

Ad Hoc