Password Protect Plugin Showing Log In Form

Hi!

I've used the Password Protect plugin many times in the past without any issues until now! I recently installed it on a new site and when we view the page on the front-end we are presented with the Wordpress Log-In Form instead of the single password field.

Below is the URL where this is happening:

https://functionalfamilymedicine.net/the-referral-test-page/

Could the SSL certificate be causing the issue?

Thank you so much and cheers!