Fatal error: Uncaught Error: Using $this when not in object context in /home/asosupro/public_html/vendor/edofre/yii2-fullcalendar-scheduler/demos/external-dragging.php:11 Stack trace: #0 {main} thrown in /home/asosupro/public_html/vendor/edofre/yii2-fullcalendar-scheduler/demos/external-dragging.php on line 11