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Since you are WordPress, install "Really Simple SSL" plugin https://really-simple-ssl.com/ You have a mixed content warning as well as the redirect problem. Really Simple SSL will fix that pretty painlessly. Worth the $25 for the premium version but the free version is also great. Also looks like your host may be WP Engine? They can work with you to help as well. I see the mixed content warning if I go directly to the page: https://intercallsystems.com/nurse-call-manufacturer/

^^ Ayup.