Fatal error: Uncaught Error: Class "yii\db\mysql\QueryBuilder" not found in /home/akg/public_html/craft/vendor/craftcms/cms/src/db/mysql/QueryBuilder.php:22 Stack trace: #0 {main} thrown in /home/akg/public_html/craft/vendor/craftcms/cms/src/db/mysql/QueryBuilder.php on line 22