Fatal error: Uncaught Error: Class 'yii\httpclient\Transport' not found in C:\xampp\htdocs\cfdi_esencial\vendor\yiisoft\yii2-httpclient\src\MockTransport.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\cfdi_esencial\vendor\yiisoft\yii2-httpclient\src\MockTransport.php on line 12