Fatal error: Uncaught Error: Class 'yii\db\ActiveRecord' not found in /home/wittyly/public_html/staging/hr-witty/models/announcement/AnnouncementBoardAccess.php:18 Stack trace: #0 {main} thrown in /home/wittyly/public_html/staging/hr-witty/models/announcement/AnnouncementBoardAccess.php on line 18