The degree of grinding is too coarse.
Manually set the degree of grinding to a finer degree in increments:
Open the coffee machine door.
CM xxxx:
CVA 7xxx: Remove the water container. The slide control for adjusting the degree of grinding is located on the top left behind the water container.
CVA 5xxx and 6xxx:
Push the slide control exactly 1 setting to the left (for finer grinding).
Close the appliance door.
Make one cup of coffee.
Adjust the degree of grinding again by 1 setting, if required.