Fatal error: Uncaught Error: Class "PayPal\Api\Authorization" not found in D:\xampp\htdocs\SSWPOS\vendor\paypal\rest-api-sdk-php\sample\payments\GetAuthorization.php:21 Stack trace: #0 {main} thrown in D:\xampp\htdocs\SSWPOS\vendor\paypal\rest-api-sdk-php\sample\payments\GetAuthorization.php on line 21