1, the solenoid valve of the brewing head is blocked.
2. The water pump doesn't work and the boiler doesn't feed water.
3. The boiler is not heated and there is no pressure.
I still suggest that you call the after-sales service and let professionals repair it.
Extended data
Are you sure you don't add water or don't add water after adding water? There is an essential difference between the two. If the coffee machine does not add water, there is a great possibility that the water pump will go wrong. This machine needs disassembly and maintenance. If you don't extract after adding water, the water outlet needle of the first capsule is blocked and the second extraction port is blocked. You can dredge it yourself with a fine needle.
Without water,
First, the water pump may be broken.
Second, the solenoid valve is broken.
Third, the outlet solenoid valve is blocked.
Fourth, the one-way pipe of the water inlet pipe is blocked.