How can I fix 'Roblox error code 403: an error was encountered during authentication 2023' on my computer?

To fix this on a computer: 1. Double-check your username and password for typos. 2. Restart Roblox and your web browser completely. 3. Clear your browser's cache and cookies for Roblox. 4. Ensure your internet connection is stable; try restarting your router. 5. Temporarily disable any VPN or proxy software. 6. Try logging in using a different web browser. 7. As a last resort, uninstall and then reinstall the Roblox Player application.