Saeco incanto

With my Saeco Incanto S-Class coffee machine, there is no water when you press the express button < br> normal coffee works.

Have you tried teaching the key? Stay on the button until the desired amount of water is in the cup.
Or does the key not react at all?

I kept the button pressed and water is coming in. When the "Espresso" button is pressed, coffee is ground, but there is no water.

And if you stay longer on the espresso button until you have the desired amount of water. Then let go of the button.
As such, stay on the espresso button during and after the grinding of the powder.

Stayed on the button longer. The display shows "teach-in" coffee is being ground, coffee is also coming. When the button for the desired amount of espresso coffee is released, the machine is ready again. When I press the espresso button, coffee is ground and ejected dry. But there is no water for the espresso, cup remains empty.

What aroma did you set for the espresso in the menu? Maybe turn that down from strong to normal.
Otherwise try what is explained on the following link.
This is only true if the reference always breaks off.

Thanks for the tip, coffee was too finely ground.
Espresso can be drunk again!