Fatal error: Uncaught Error: Class "Braintree\Base" not found in C:\AppServ\www\greenhess-storage\vendor\braintree\braintree_php\lib\Braintree\PartnerMerchant.php:18 Stack trace: #0 {main} thrown in C:\AppServ\www\greenhess-storage\vendor\braintree\braintree_php\lib\Braintree\PartnerMerchant.php on line 18