Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/wittyly/public_html/live/hr-witty/migrations/m220109_115251_alter_account_assets_tbl_add_warranty_expiry_date_col.php:8 Stack trace: #0 {main} thrown in /home/wittyly/public_html/live/hr-witty/migrations/m220109_115251_alter_account_assets_tbl_add_warranty_expiry_date_col.php on line 8