Here are some general steps you can try to resolve the issue:
1. Restart the Riot Client and VALORANT: Close both and open them again.
2. Check Your Network: Ensure your internet connection is stable. Restart your router if needed.
3. Run as Administrator: Right-click on the VALORANT icon and select "Run as administrator."
4. Firewall/Antivirus: Ensure VALORANT and Riot Vanguard are allowed through your firewall and antivirus settings.
5. Reinstall Riot Vanguard: Uninstall Riot Vanguard and then restart VALORANT, which should prompt a reinstall.
6. Update Windows and Drivers: Ensure your operating system and GPU drivers are up-to-date.