Clatronic KAV 2936

Hello together,
I'm new here in the forum and would like to greet everyone.
My problem
No coffee leaks out at my KV (lands as plörre in the pomace container).
Machine is about 3 years old and has been decalcified regularly on message.
Flow meter is common and clean.
Brew group I completely disassembled and cleaned all sieves and channels.
When I remove the "ball valve" with spring in the upper hose of the brewing group, coffee escapes at the intended outlet, but has zero crema.
Can I still save something, or is the machine for the scrap.
Greeting and thanks in advance
Lodengrin

P.S. I'm not sure if I didn't swap the two hoses at the flow meter. If so, is that substantial?????

Hello!
I believe the 2 sealing rings in the brewhouse where the pipe goes from the brewing group into the machine with the 2 seals

Hi and thanks for the rache reply.

Has now changed all seals in the brew group and to the brew group.
Always still the same.

I now suspect that the seal where the coffee grounds are pressed will leak before the ball valve opens.

May it be that I ever have too little pressure.

Thanks in advance
Lodengrin