Hi! I understand your 3 Tiles app is not opening on your Kindle device running Android 9. Let's get it working again. Before I suggest solutions, could you share if you see any error message when you try to open the app or if it just stays stuck or closes immediately?

Meanwhile, here are some basic steps we can try to fix the app not opening:

1. Restart your Kindle: Sometimes a simple reboot clears temporary glitches.

2. Clear app cache and data:
- Go to Settings > Apps & notifications > See all apps > find 3 Tiles.
- Tap on Storage & cache.
- Tap "Clear Cache" first, then if that doesn’t work, tap "Clear Storage" or "Clear Data" (this may reset app settings or delete saved progress).

3. Check for app updates:
- Open the Amazon Appstore or wherever you downloaded 3 Tiles.
- See if there’s an update available; install if yes.

4. Reinstall the app:
- Uninstall 3 Tiles.
- Reboot your device again.
- Download and install the app fresh.

If you have already tried these steps, let me know. There are some known issues with app loading related to device storage or updates, which we can troubleshoot next.

Are you able to try these and share what happens? That way, I can guide you further specifically for your Kindle and Android 9.

Closes immediately

Thanks for letting me know the app closes immediately when you try to open it. That helps a lot. Since you've likely tried basic restarts and clearing cache, let's move into some more specific steps tailored for your Kindle Android 9 device to address this auto-close issue.

Here’s what I suggest next:

1. Check Device Storage:
Low storage can cause apps to crash. Go to Settings > Storage and make sure you have enough free space (at least a few hundred MBs). If storage is low, try deleting some unused files or apps.

2. Force Stop and Clear Data Once More:
Sometimes clearing cache alone isn’t sufficient.
- Go to Settings > Apps & Notifications > 3 Tiles
- Tap Force Stop
- Then tap Storage & cache > Clear Storage / Clear Data
- Try launching the app again.

3. Check App Permissions:
Insufficient permissions might cause the app to crash.
- Go to Settings > Apps & Notifications > 3 Tiles > Permissions.
- Ensure the app has permissions to access storage, network, and any other relevant services.

4. Update Your Kindle and Apps:
- Check for any system updates under Settings > Device Options > System Updates.
- Also, update the 3 Tiles app via the app store you used.

5. Clear System Cache Partition:
This is a bit more advanced but can fix various app issues:
- Power off your Kindle.
- Press and hold Volume Up + Power button together until the recovery menu appears.
- Use volume buttons to navigate to Wipe Cache Partition and select with the power button.
- Once done, reboot the device and try the app again.

6. Reinstall the App:
If not done recently, uninstall and reinstall the app after the above steps.

If after these the app still closes immediately, there might be a compatibility issue with your device or Android version, or a recent app update that introduced a bug. In that case, I can check if there are any known issues or patches available.

Let me know if you want me to guide you through any of these steps in detail or if you have tried some already! Are you okay with trying these now?