Fatal error: Uncaught Error: Interface "Braintree\HttpHelpers\HttpRequest" not found in C:\xampp\htdocs\public\vendor\braintree\braintree_php\lib\Braintree\HttpHelpers\CurlRequest.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\public\vendor\braintree\braintree_php\lib\Braintree\HttpHelpers\CurlRequest.php on line 6