Once you’ve reset the app settings on your Android system, restart your device and check for the Android System UI has stopped issue. Fix #7: Install software updates.

If your Android phone has its own dedicated System UI app, you can clear its cache by following these steps: On your Android device, navigate to the Settings app.

Another trick that some Android users discovered to fix System UI has stopped error is by removing widgets. A widget is a tiny screen of a particular app installed on your device.