If the app is not working properly, you can try the following:
- Close the app (swipe it from cache memory) and reopen it.
- Log out, close the app and log in again. Make sure that you log in to the app with the right user account.
- Update the app to the newest version.
- Delete the app and reload it.
- Make sure that you are logged in to the right Apple App Store / Google Play account (the one that you used for starting the subscription).