Step 1 - Restart Your Phone
1. Press your phone's power button. On the screen, tap Restart .
2. If you don't see "Restart," press your phone's power button for about 30 seconds, until your phone restarts.
Check if this has fixed the issue, if not please proceed to Step 2 below.
Step 2 – Check for Android Updates
1. Open your phone's Settings app.
2. Near the bottom, tap System Advanced System update. If needed, first tap About phone or About tablet.
3. You'll see your update status. Follow any steps on the screen.
Step 3 – If there was an Update, after Updating the App - Restart your Phone again.