Artful.ly widget not working

I’ve installed the Artful.ly widget and cannot get it to work on my site.

I themed my own site, and the artful.ly widget doesn’t work on:
https://capitalirishfilmfestival.org/schedule/

but it works fine on another site I themed:
https://solasnua.org/ciff2013-tickets/

Could someone please help me figure out why?

I have done everything except reinstall WP
—I have deactivated all the plugins
—copied the theme from the “solasnua.org” site and used that — it doesn’t work

I am at a loss.

thanks for any help.