Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/wittyly/public_html/live/hr-witty/migrations/m220106_043019_update_request_out_of_office_add_hr_duration.php:8 Stack trace: #0 {main} thrown in /home/wittyly/public_html/live/hr-witty/migrations/m220106_043019_update_request_out_of_office_add_hr_duration.php on line 8