Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/wittyly/public_html/staging/hr-witty/migrations/m201204_013807_add_tbl_indexes.php:8
Stack trace:
#0 {main}
thrown in /home/wittyly/public_html/staging/hr-witty/migrations/m201204_013807_add_tbl_indexes.php on line 8