Hi there! I understand that your FreeStyle Libre 3 app has been running slowly, and it's causing charts not to display. Let's work together to improve the situation.

First, could you let me know if you’ve recently updated the app or your device’s operating system? Sometimes, issues like this can happen after updates. Additionally, please check if you've tried any troubleshooting steps already, like restarting the app or your device.

In the meantime, here are a few basic steps you can try to potentially enhance the app's performance:

1. Restart the App: Simply force close the app and then reopen it to see if that helps.

2. Check for Updates: Make sure that you're using the latest version of the FreeStyle Libre 3 app. You can check for updates in the Microsoft Store.

3. Clear Cache: Sometimes, clearing the app cache can help. You might find this option in the app settings.

4. Free Up Space: Ensure that your device has enough storage space available. Low storage can affect app performance.

5. Network Connection: Since the app relies on internet connectivity, make sure you're on a strong Wi-Fi or mobile data connection.

If you've tried these steps and the app is still slow or the charts aren't displaying, let me know. We can delve deeper into troubleshooting or consider contacting higher-level support for further assistance. Your experience with the app is important to me!

Are you satisfied with the steps I've provided so far?