If you purchased an In-App feature, e.g. the Premium Membership, it might happen, that the extra feature is not anymore available for you later on or not activated yet.
If that is the case, you are able to restore the In-App purchase.
To do so, tap the “Profile” tab followed by the “gear icon” to reach the settings of the adidas Running app. Choose "adidas Running & Premium" and then "Restore In-App Purchases".
Make sure to use the same Apple account you used when you purchased the extra feature the first time.