1, due to low program version or network problems. The failure of digital certificate assistant program version detection may be caused by low program version or network problems. It is recommended to download the program installation package again and install the latest version, or check whether the network connection is normal.

2. The browser does not support it. When the certificate assistant can't connect to the server, you can choose another browser to reopen the interface, probably because the browser system doesn't support it.

3. Change to another browser. The server policy cannot be downloaded because it is not supported by the browser. You can try another browser. Digital Certificate Assistant is a digital certificate authentication system (TopCA.CN) independently developed by Tiancheng Anxin Technology Co., Ltd. and enjoying completely independent intellectual property rights.