If the Sleeper app is not updating scores on the matchup screen, follow these steps to troubleshoot the issue:

1. Check for App Updates: Make sure you are using the latest version of the Sleeper app. Go to the app store on your device and see if an update is available. Updating the app can resolve many glitches and bugs.

2. Refresh the Matchup Screen: Try pulling down the matchup screen to refresh it. This action can sometimes trigger an update of the scores and player statistics.

3. Restart the App: Close the Sleeper app completely, then re-open it. A simple restart can often fix many issues related to data display.

4. Clear Cache (if applicable): If you are using an Android device, go to your device settings, find the Sleeper app, and clear its cache. This can help remove any temporary files that may be causing problems.

5. Check Your Internet Connection: Ensure you have a stable internet connection. Try connecting to a different Wi-Fi network or switch to mobile data to see if the issue persists.

6. Log Out and Back In: Sometimes, logging out of your account and then logging back in can reset any issues you may be experiencing with the app.

7. Review Server Status: Visit Downdetector or the Sleeper’s social media for real-time reports of outages. If there's a known issue with the scores updating, it may be on Sleeper's end - learn more - learn more.

8. Contact Support: If the problem continues, reach out to Sleeper’s customer support. They may be aware of specific issues affecting the app and can provide further assistance - learn more.

9. Join Community Discussions: Check forums or Reddit threads where other users may be discussing similar issues. Often, community solutions can be very helpful - learn more - learn more.

By following these steps, you should be able to address the issue of scores not updating on the matchup screen in the Sleeper app.