小程序开通支付分提示系统繁忙。微信后台给我的ret_code：271313965，这是什么意思？sign已用工具校验过是一致的。

我这样传的参数没问题吧？

extraData:{"mch_id":"xxxxxxxxxx","service_id":"xxxxxxxxxxxxxxxxxxxx","out_request_no":"CA6IUM9MWMILNNN8IRNQ","timestamp":"1578534963","nonce_str":"Mh7YT4eZ9X7s2XVvNMCH4CWJGnMP21SQ","sign_type":"HMAC-SHA256","sign":"6B78C1D39B72B4D178721CC95D8CC2959E06A9FD3B27093A61AD4F468299B875"}