Fatal error: Uncaught Exception: check sign Fail! The reason : signData is Empty in /HN/wwwroot/xingtu568.com/api/payment/alipay/aop/AopCertClient.php:995 Stack trace: #0 /HN/wwwroot/xingtu568.com/api/payment/alipay/aop/AopCertClient.php(621): AopCertClient->checkResponseSign() #1 /HN/wwwroot/xingtu568.com/api/payment/alipay/alipayRefund.php(198): AopCertClient->execute() #2 /HN/wwwroot/xingtu568.com/include/common.func.php(16120): alipayRefund->refund() #3 /HN/wwwroot/xingtu568.com/include/cron/shop_quanRefund.php(53): refund() #4 /HN/wwwroot/xingtu568.com/include/class/cron.class.php(68): include('/HN/wwwroot/xin...') #5 /HN/wwwroot/xingtu568.com/include/common.inc.php(1836): Cron::run() #6 /HN/wwwroot/xingtu568.com/index.php(3): require_once('/HN/wwwroot/xin...') #7 {main} thrown in /HN/wwwroot/xingtu568.com/api/payment/alipay/aop/AopCertClient.php on line 995