ProductPrimaDonna SoulMessage: If needed, fill milk container using the refill lid
PrimaDonna Soul

Message: If needed, fill milk container using the refill lid

Try this solution

Open the refill lid on the milk container and pour in the milk without exceeding the MAX level

Possible cause:
While preparing milk-based beverages, if the milk in the container is not enough to make the selected beverage, the appliance recommends you top up the container without removing it.