DeLonghi ECAM 23.466.B drips from hot water tap

Hello all,

I have the Delonghi ECAM 23.466.B automatic coffee maker, which drips from the hot water tap when I turn it on and brew coffee. When making cappucino, too much milk comes out of the milk nozzle and the cappucino tastes watery. To illustrate this, I have attached a picture showing the switch on process. The blue circled one shows the water drops from the hot water tap and the lower blue circle shows the place where it lands

In this forum I found a thread in which I think the same problem is described:

https://www.kaffeevollautomaten.org/forums/index.php?showtopic=20769

The solution here was to change the solenoid valve. The red circles in the attachment show the solenoid valves. Can anyone tell me if the upper or lower solenoid valve should be replaced. Or is it not this at all.

Thanks a lot