Fatal error: Uncaught Error: Class 'Braintree\Instance' not found in /home/app/htdocs/lidia/vendor/braintree/braintree_php/lib/Braintree/Descriptor.php:4 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/braintree/braintree_php/lib/Braintree/Descriptor.php on line 4