Fatal error: Uncaught Error: Class "PayPalCheckoutSdk\Core\PayPalEnvironment" not found in /var/www/develop/www/php/vendor/paypal/paypal-checkout-sdk/lib/PayPalCheckoutSdk/Core/SandboxEnvironment.php:5 Stack trace: #0 {main} thrown in /var/www/develop/www/php/vendor/paypal/paypal-checkout-sdk/lib/PayPalCheckoutSdk/Core/SandboxEnvironment.php on line 5