Hi Pauline Abah,
May I know if the same error appears when you use Copilot in a web browser or only in the Windows app? Also, are you signed in with a personal account or a work/school account?
If the issue is limited to the app, try reinstalling it:
- Open Settings > Apps > Installed apps.
- Find Copilot, select the three dots, then choose Uninstall.
- Restart your computer.
- Open Microsoft Store, search for Microsoft Copilot and select Install.
- Open Copilot and sign in again.
If the error continues, try a different network, such as a mobile hotspot. You can also open Get Help, search for Copilot connectivity troubleshooter and follow the prompts.
Please let me know whether Copilot works in the browser and what happens after reinstalling it.