Fatal error: Uncaught Error: Class 'Braintree\Collection' not found in /home/app/htdocs/ninja/vendor/braintree/braintree_php/lib/Braintree/Error/ValidationErrorCollection.php:19
Stack trace:
#0 {main}
thrown in /home/app/htdocs/ninja/vendor/braintree/braintree_php/lib/Braintree/Error/ValidationErrorCollection.php on line 19