Fatal error: Uncaught Error: Class "yii\base\Module" not found in D:\xampp\htdocs\vhost\b2g.businessgateways.in\New folder (3)\b2g_mail\modules\mail\Module.php:5 Stack trace: #0 {main} thrown in D:\xampp\htdocs\vhost\b2g.businessgateways.in\New folder (3)\b2g_mail\modules\mail\Module.php on line 5