Sidebars disappear on event page

I am using WP 4.3 with Twenty Fourteen theme and Event Calendar WD plugin. The calendar looks great in most areas but when you open the event page (single-event.php), the page sidebars disappear.

See: http://conventionsonly.com/event/southern-maryland-comic-con-2/
(no sidebars)
Versus: http://conventionsonly.com/events/
(sidebars show up)

Thank you for your help!

https://wordpress.org/plugins/event-calendar-wd/