Hi there! I understand you're having trouble downloading PolyBuzz on your ChromeOS device. Let’s work through this together.

Could you provide a little more detail about the situation? For example, are you encountering any error messages, or does the download simply not start?

In the meantime, I can suggest a few general steps to troubleshoot the issue:

1. Check Internet Connection: Ensure your device is connected to the internet. Try loading a webpage to confirm that.

2. Clear Cache and Data: If you are downloading from the Google Play Store, it can help to clear the cache and data:
- Go to Settings > Apps.
- Find Google Play Store.
- Tap on Storage and then select Clear Cache and Clear Data.

3. Reboot Your Device: A simple restart can often clear issues that are preventing downloads.

4. Check for Device Updates: Make sure your ChromeOS is up to date by going to Settings > About Chrome OS > Check for updates.

5. Reinstall Google Play Services: If the above steps don’t work, uninstalling and reinstalling Google Play Services may be necessary:
- Go to Settings > Apps > Google Play Services and uninstall updates.

If none of those options work, please let me know, and we can look into more advanced troubleshooting or specific error codes if you're seeing any.