Fatal error: Uncaught Error: Call to undefined function tribe_classes() in /home/domains/thebrainhackcafe.com/public/wp-content/plugins/the-events-calendar/common/src/admin-views/notices/upsell/main.php:30
Stack trace:
#0 {main}
thrown in /home/domains/thebrainhackcafe.com/public/wp-content/plugins/the-events-calendar/common/src/admin-views/notices/upsell/main.php on line 30