Frage Fresh water leak from mixer tap

I have a water leak (water dripping into the cupboard below the sink) from the mixer hot/cold water discharge side of the mixer tap of my 2016 Club Joker City. It appears to be a leak from the pipe upper crimped joint (silver) in the black pipe section. See enclosed photograph.

I would be grateful for any advice on how to resolve this including hyperlinks to possible sourcing of spare parts.

... which photograph... ?
Regards norge

Photograph attached.

We had also a leak in our Amundsen and went to our dealer. Finally the cause was not the piping but only the water tap / shower head. There was a small rinse from there to the piping. Just try first if the shower had is thoroughly fixt.
Hope it helps,
Miguel

I had the same problem in my Club Joker City. And as Miguel wrote for his Amundsen, tightening the atachement of the shower head / Water Tap helped.
Regards
Dieter