Sensor kaputt? DeLonghi ECAM 352.52.

Hello,

During the descaling process of my DeLonghi it just did not go forward. First it was always displayed that you have to put a new drip tray under and then after switching on again, it was continuously displayed that the water flow is empty and the progress bar has done nothing.
I then googled and read that the flowmeter may be dirty.
I have the flowmeter times removed, briefly cleaned and reconnected. Now, however, the machine takes 20x as long and almost 0.5l of water to heat up and an espresso would run through forever if you do not finish it manually.

Is the sensor broken or did I not terminate the flow sensor 100% correctly again? What do you guys think?

Thanks a lot!