Fatal error: Uncaught Error: Interface "CoreInterfaces\Http\HttpConfigurations" not found in C:\xampp\htdocs\www\zdxnew\web\vendor\paypal\paypal-server-sdk\src\ConfigurationInterface.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\www\zdxnew\web\vendor\paypal\paypal-server-sdk\src\ConfigurationInterface.php on line 21