Shortcode doesn’t work on any page but one

Tested with a default theme and no plugins except Events Manager and Events Manager Pro and WP-Fullcalendar.

On one page: https://www.fullcircleartdesign.com/classes/class-calendar/ it works just fine. On another page: https://www.fullcircleartdesign.com/classes/register-for-classes/ it doesn’t work at all although it looks like it’s there in the source.

I’ve tried with [fullcalendar] and with more detail [fullcalendar type=”event”]. Neither work.