Solutions:
1. Turn off the proxy server Settings of WiFi.
2. Ignore (don't save) the network and reconnect.
3. Upgrade to the latest version of the system.
4. If other devices work normally in this WiFi environment, it is suggested to disconnect the device and reconnect it to see if it can be used normally.
5. If it is for the company's network, it is suggested to contact the company's network management to check or assign static IP solution.
6. It is recommended to update the router firmware to try to fix it.
7. Stop and uninstall the third-party optimization software and try again.
8. After backing up the data, clean out all the data and try again.
9. If none of the above methods can solve this issue, it is recommended to go to after-sale center for inspection.
