Fatal error: Uncaught Error: Class "yii\base\Model" not found in D:\xampp\htdocs\vhost\b2g.businessgateways.in\New folder (3)\nibe_datamanager\models\ContactForm.php:13 Stack trace: #0 {main} thrown in D:\xampp\htdocs\vhost\b2g.businessgateways.in\New folder (3)\nibe_datamanager\models\ContactForm.php on line 13