Fatal error: Uncaught Error: Class "Magento\Checkout\Model\DefaultConfigProvider" not found in /var/www/magento/html/app/code/BBNT/Checkout/Model/DefaultConfigProvider.php:36 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/BBNT/Checkout/Model/DefaultConfigProvider.php on line 36