Fatal error: Uncaught Error: Class "Braintree\Instance" not found in C:\xampp\htdocs\Restaurant-0.3.1\vendor\braintree\braintree_php\lib\Braintree\Transaction\CustomerDetails.php:13 Stack trace: #0 {main} thrown in C:\xampp\htdocs\Restaurant-0.3.1\vendor\braintree\braintree_php\lib\Braintree\Transaction\CustomerDetails.php on line 13