Fatal error: Uncaught Error: Call to undefined function tribe() in /home/www/sieml/wp-content/plugins/the-events-calendar/src/admin-views/aggregator/tabs/import-form.php:4 Stack trace: #0 /home/www/sieml/wp-content/plugins/the-events-calendar/src/admin-views/aggregator/tabs/new.php(5): include() #1 {main} thrown in /home/www/sieml/wp-content/plugins/the-events-calendar/src/admin-views/aggregator/tabs/import-form.php on line 4