Please check the following aspects to see if you can get it done.
1. Is it an IE browser? Tools in the menu->; Internet options-> (security) tab->; Select the default level. Then confirm.
2. Have you recently installed anti-virus software and deleted all web items or web blocking options?
3. Baidu and Google Toolbars, which include page interception and deletion.
4. Open, c: \ program files \ JRE _ _ _ _ \ bin to see if the java plug-in is installed! (_ _ _ is a wildcard).
5. Open it again and see if you can get in. If it still works, I want to see if the network is not working.
6. Not yet. Go to the executor.