Hi! I understand you're having trouble withdrawing or transferring funds using the UBA app on your device. Let's see how we can get this sorted out.

To start, could you tell me a bit more about what happens when you try to withdraw or transfer? For example:
- Do you get an error message? If yes, what does it say exactly?
- Is the app letting you initiate the transaction but failing afterward?
- Have you checked if your account balance is sufficient?
- Is your internet connection stable at the time of trying?

Meanwhile, here are some basic steps to try resolving this issue on your Android device (WebKit browser, Android 10):

1. Check your internet connection: Make sure you have a stable and strong internet connection, either Wi-Fi or mobile data.

2. Update the UBA app or clear cache:
- Go to your device’s Settings > Apps > UBA app.
- Clear the cache and, if possible, clear data (note clearing data may log you out and reset app settings).
- Alternatively, check for any updates for the UBA app on the Play Store and install them.

3. Verify account status and limits:
- Sometimes restrictions or holds on your account can prevent transactions.
- Ensure your account is verified and active.
- Check if you have any daily transaction limits that you may have reached.

4. Log out and log back in:
- Sometimes session issues cause transaction failures.
- Log out of the app and sign back in to refresh your session.

5. Try on a different network or device if possible: This can help rule out device-specific or network restrictions.

6. Check for pending app permissions:
- Ensure UBA app has necessary permissions, such as access to the internet.

If the above steps don’t work, please share any error messages or behaviors you observe, so I can guide you further with more specific solutions.

Are you able to try these out and let me know how it goes?