Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/wittyly/public_html/live/hr-witty/migrations/m200207_083247_update_out_of_office_mgmt_url_module_navigation.php:9 Stack trace: #0 {main} thrown in /home/wittyly/public_html/live/hr-witty/migrations/m200207_083247_update_out_of_office_mgmt_url_module_navigation.php on line 9