The drip tray and grounds container have not been inserted correctly in the coffee machine.
Empty the drip tray and grounds container.
Reinsert the drip tray and grounds container.
Insert drip tray and grounds container appears on the coffee machine display.
Empty the drip tray and grounds container.
Reinsert the drip tray and grounds container.
When you open the coffee machine, you must always empty the drip tray and grounds container.