Fatal error: Uncaught Error: Class "PayPalHttp\HttpRequest" not found in /var/www/develop/www/php/vendor/paypal/paypal-checkout-sdk/lib/PayPalCheckoutSdk/Orders/OrdersValidateRequest.php:14 Stack trace: #0 {main} thrown in /var/www/develop/www/php/vendor/paypal/paypal-checkout-sdk/lib/PayPalCheckoutSdk/Orders/OrdersValidateRequest.php on line 14