If an app on your iPhone or iPad isn't working as expected, try this.
Force the app to close. Then open the app to see if it's working as expected.
Restart your iPhone or restart your iPad. Then open the app to see if it's working as expected.
To see if updates are available for the app, open the App Store, tap your profile icon, then tap App Updates. If updates aren’t available for the app, update the software on your iPhone or iPad.
Delete the app. When you do this, you may lose data that was stored in the app. Then re-download the app. Then check whether the problem with the app is fixed.
If you found the app on the App Store, contact the app developer.
If you’ve bought the app recently and you no longer want it, you can also request a refund.