Hi! I see you're getting a black screen when trying to use Zangi on your Kindle with Android 11. Let's get to the bottom of this together.

Could you tell me a bit more? For example:
- Does the black screen appear right after launching the app, or when you try to do something specific?
- Have you tried restarting the app or your device yet?
- Did this issue start after an app update or OS update recently?
- Are other apps working fine on your Kindle?

Once I have these details, I can guide you more precisely.

In the meantime, here are some initial steps you can try that often resolve black screen issues in apps like Zangi:

1. Force Close and Restart App
- Go to your Kindle's Settings.
- Tap Apps or Applications.
- Find Zangi in the list and tap it.
- Tap "Force Stop" to fully close the app.
- Then reopen Zangi and see if it loads properly.

2. Clear Cache
- In the same Zangi app settings screen, tap "Storage & cache."
- Tap "Clear Cache" (do NOT clear data yet, to avoid losing your account info).
- Reopen the app.

3. Check for App Updates
- Open the Google Play Store or Amazon Appstore on your Kindle.
- Search for Zangi Private Messenger.
- If there's an update, install it and retry.

4. Restart Your Device
- Hold the power button on your Kindle and choose Restart.
- Once rebooted, try opening Zangi again.

If none of these steps help, there might be a deeper issue like app compatibility or corrupted app data, and we can try reinstalling or dive into advanced troubleshooting.

Let me know how these go or if you already tried any, and we’ll take it from there!

Are you able to try these now?