Fatal error: Uncaught Error: Class 'Braintree_Exception' not found in /var/www/html/www.ecsprepaidportal.com/braintree/lib/Braintree/Exception/Authentication.php:18 Stack trace: #0 {main} thrown in /var/www/html/www.ecsprepaidportal.com/braintree/lib/Braintree/Exception/Authentication.php on line 18