Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/wittyly/public_html/live/hr-witty/migrations/m200627_044120_drop_org_id_column_from_accounts_table.php:9 Stack trace: #0 {main} thrown in /home/wittyly/public_html/live/hr-witty/migrations/m200627_044120_drop_org_id_column_from_accounts_table.php on line 9