RoboVac L70 no mopping! Help

I have a RoboVac L70, the mapping does not work (only dry). The water tank is full and the mop module is inserted.
what can i do, is it defective?

Mopping or mapping? Two different things I know (not an English speaker as well) . :smiley:
Think you mean mopping
You should give us more informations.

What kind of error indication do you get?
Normally (I got a 11S model) there are different “beeping” tones when an error shows up.

I believe the issue is the same as here below