Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/wittyly/public_html/live/hr-witty/migrations/m201030_030932_add_rows_for_module_navigation_and_default_settings.php:8 Stack trace: #0 {main} thrown in /home/wittyly/public_html/live/hr-witty/migrations/m201030_030932_add_rows_for_module_navigation_and_default_settings.php on line 8