Display groups shortcode doesn’t work

I want to split team members out into two sections. One for this year’s speakers and another one for past contributors.

I created two categories, one called ‘2019’ and one called ‘Past’ and assigned the members accordingly. I used this shortcode on the speakers page [meet-my-team show_groups=”2019” cols=”5″ disable_modal_centering=”true”] but it’s still displaying all the members.

From what I can tell there is nothing wrong with the shortcode – it looks to be broken.

The page I need help with: [log in to see the link]