Water light can't be reset (by 2 users)

I bought a Starbucks Saeco Sirena espresso maker a month. Now it has a problem that the blue water light does not go off even though there is water. The light is on steadily (not blinking). I just can't reset the light. I tried lifting the water tank, wiping the bottom plug, putting it back. I tried a few times, it still does not work. With the blue water light on, the machine simply does not work.

Greatly appreciate your help!

Kan


I ran very finely ground coffee through the Sirena and nothing came out. Now, the blue water light blinks but the button light won't come on at all. I tried taking the water basket out and replacing it but nothing seems to work. I can't prime the machine because the button lights won't come on.