Fatal error: Uncaught Error: Class 'yii\base\Model' not found in /home/ppccom/public_html/order/vendor/philippfrenzel/yii2fullcalendar/models/Event.php:7 Stack trace: #0 {main} thrown in /home/ppccom/public_html/order/vendor/philippfrenzel/yii2fullcalendar/models/Event.php on line 7