Fatal error: Uncaught Error: Class 'WP_Widget' not found in /home/betam/public_html/wp-content/plugins/the-events-calendar/common/src/Tribe/Widget/Widget_Abstract.php:15 Stack trace: #0 {main} thrown in /home/betam/public_html/wp-content/plugins/the-events-calendar/common/src/Tribe/Widget/Widget_Abstract.php on line 15