Fatal error: Uncaught Error: Interface 'PayPalHttp\Environment' not found in /var/www/html/RIE/vendor/paypal/paypal-checkout-sdk/lib/PayPalCheckoutSdk/Core/PayPalEnvironment.php:7 Stack trace: #0 {main} thrown in /var/www/html/RIE/vendor/paypal/paypal-checkout-sdk/lib/PayPalCheckoutSdk/Core/PayPalEnvironment.php on line 7