Fatal error: Uncaught Error: Class 'MercadoPago\Entity' not found in C:\xampp\htdocs\portal\vendor\mercadopago\dx-php\src\MercadoPago\Entities\DiscountCampaign.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\portal\vendor\mercadopago\dx-php\src\MercadoPago\Entities\DiscountCampaign.php on line 18