Fatal error: Uncaught Error: Class "Braintree\Http" not found in C:\AppServ\www\greenhess-storage\vendor\braintree\braintree_php\tests\integration\HttpClientApi.php:9 Stack trace: #0 C:\AppServ\www\greenhess-storage\vendor\braintree\braintree_php\tests\Setup.php(5): require_once() #1 {main} thrown in C:\AppServ\www\greenhess-storage\vendor\braintree\braintree_php\tests\integration\HttpClientApi.php on line 9