Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/wittyly/public_html/live/hr-witty/migrations/m210129_072142_update_meeting_participants_add_column_account_id.php:8 Stack trace: #0 {main} thrown in /home/wittyly/public_html/live/hr-witty/migrations/m210129_072142_update_meeting_participants_add_column_account_id.php on line 8