Latte Select: Why is the button for a specific beverage not illuminated?

Latte Select: Suggestion 1: Via the menu, you can also modify and save recipes individually under the buttons or the My Coffee profiles (see 'Permanently changing recipe settings' in the operating manual). The bean reservoir required for the recipe is empty. Please refill the beans.
Suggestion 2: As an alternative, you can also set via the control panel that a different type of bean is used for this one cup.
Suggestion 3: In addition, via the menu you can permanently change the assignment of a bean type to a specific recipe or disable the automatic bean selection entirely (see the chapter 'Changing basic settings' in the operating manual).