Warning: require_once(PayPal/Type/AbstractResponseType.php): failed to open stream: No such file or directory in /var/www/html/sevence/common/pear/PayPal/Type/DoReferenceTransactionResponseType.php on line 9

Fatal error: require_once(): Failed opening required 'PayPal/Type/AbstractResponseType.php' (include_path='.:/usr/share/php') in /var/www/html/sevence/common/pear/PayPal/Type/DoReferenceTransactionResponseType.php on line 9