xnau on "[Plugin: Participants Database] Pages after #1 not showing"

At least in Firefox & IE, nothing after the 1st screen of listings shows. Any idea what would be going on here? This has worked until relatively recently.
http://businesshealthcaregroup.org/about-bhcg/who-is-the-bhcg/member-directory/

https://wordpress.org/plugins/participants-database/

It looks like the sessions aren't working. Are you using the latest version of the plugin? Make sure you are, then go to the plugin settings under the advanced tab and try changing the "Use PHP Sessions" checkbox. If that doesn't fix it, uncheck "Enable AJAX Search Functionality"