在文件crmeb/services/pay/storage/WechatPay.php中,修改refund方法里面的错误抛出
if(isset($result['return_code']) && $result['return_code'] != 'SUCCESS') throw new AdminException($result['return_msg']);
if(isset($result['status']) && $result['status'] != 'SUCCESS') throw new AdminException($result['status']);