Appointments + needs login to view?

Hello,

I installed this plugin here: http://www.personali.com/make-an-appointment/?wcalendar=1464739200&app_provider_id=6#app_worker_excerpt_6 and it only displays horizontal lines... It displays just fine if you're logged in though so it looks like it's not working unless you're logged in. Despite the "requires login" requirement being set to no. Even if we WERE to require login... it should throw out some kind of "you must login" message not just break. Not sure what's up here... Please help!