Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/wittyly/public_html/live/hr-witty/migrations/m210323_005541_alter_card_assignee_table_change_role_to_string.php:8 Stack trace: #0 {main} thrown in /home/wittyly/public_html/live/hr-witty/migrations/m210323_005541_alter_card_assignee_table_change_role_to_string.php on line 8