Fatal error: Uncaught Error: Class "PayPalHttp\HttpRequest" not found in /var/www/html/vendor/paypal/paypal-checkout-sdk/lib/PayPalCheckoutSdk/Core/AccessTokenRequest.php:7 Stack trace: #0 {main} thrown in /var/www/html/vendor/paypal/paypal-checkout-sdk/lib/PayPalCheckoutSdk/Core/AccessTokenRequest.php on line 7