Fatal error: Uncaught Error: Class "Braintree\Http" not found in /var/www/html/storage/vendor/braintree/braintree_php/tests/integration/HttpClientApi.php:9 Stack trace: #0 /var/www/html/storage/vendor/braintree/braintree_php/tests/Setup.php(5): require_once() #1 /var/www/html/storage/vendor/braintree/braintree_php/tests/integration/TransactionWithUsBankAccountTest.php(4): require_once('...') #2 {main} thrown in /var/www/html/storage/vendor/braintree/braintree_php/tests/integration/HttpClientApi.php on line 9