Fatal error: Uncaught Error: Class 'MercadoPago\Entity' not found in /var/www/html/vendor/mercadopago/dx-php/src/MercadoPago/Entities/Preference.php:18 Stack trace: #0 {main} thrown in /var/www/html/vendor/mercadopago/dx-php/src/MercadoPago/Entities/Preference.php on line 18