Fatal error: Uncaught Error: Class 'yii\db\Migration' not found in /home/wittyly/public_html/live/hr-witty/migrations/m200703_005601_alter_users_table_add_webmail_token.php:8 Stack trace: #0 {main} thrown in /home/wittyly/public_html/live/hr-witty/migrations/m200703_005601_alter_users_table_add_webmail_token.php on line 8