Popup Pro - not popping up w/css selector

I wanted some popups on my site to show when someone clicks on a link. Following the instructions (I thought) from these threads:

I installed Popup Pro, enabled "Javascript Events" in the settings, clicked "save". Then I created a popup with Behavior->"Appear when user clicks on a css selector" and set the css selector to #ride-duties, clicked "save".

On my page I have

Review Ride Manager responsibilities <a href="#" id="ride-duties">here</a>, and don't forget to log your volunteer hours.</div>

and the page believes it updated ok.

But, the popup does not appear when "here" is clicked.

Dashboard access has been enabled.

Hopefully I'm just missing something easy.