Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/wittyly/public_html/live/hr-witty/migrations/m210913_072222_add_kpi_columns_to_card__timelog_table.php:8 Stack trace: #0 {main} thrown in /home/wittyly/public_html/live/hr-witty/migrations/m210913_072222_add_kpi_columns_to_card__timelog_table.php on line 8