Krups Orchestrao FNF2 243 water runs bottom left

I have an old Krups Ochestro FNF2 243 and for a few days now, water has been running down the housing at the bottom left, at about the beginning where the water tank stops. It is not much but it adds up. My guess would be that the whole thing comes from a leaky seal of the water tank?

Because when I fill the water tank and put it on the table, for example, without pressure being applied from below against the valve/plug, a small amount still leaks out. Should not that be tight without something / one presses against it.

Am unfortunately technically not to no knowledge and would of course prefer to rapieren instead of buying an expensive new machine. Had already thought about just buying a used water tank. Can anyone here with the error description something to start. As I said you can see on the left side of the housing, at the lowest point of the slope of the bills / level on which the water tank sits, that it drips / runs down the outside of the housing.

Thanks a lot

The inner distributor sleeve will be defective.
https://komtra.de/jura-ersatzteile/jura-ersatzteile/wassertankdichtung-innenverteilmanschette.html

https://www.juraprofi.de/Krups-Ersatzteile/Orchestro-Siziliana/Dichtungen/Innenverteilmanschette-fuer-Krups-Orchestro::2730.html

Or simply google inner distributor sleeve.