Fatal error: Uncaught Error: Class 'MercadoPago\Config\AbstractConfig' not found in C:\xampp\htdocs\portal\vendor\mercadopago\dx-php\src\MercadoPago\Config.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\portal\vendor\mercadopago\dx-php\src\MercadoPago\Config.php on line 12