How to connect a Stream AV 5000 with HomeWizard P1 meter

I'm in The Netherlands, have glasfiber internet from KPN and use a Fritzbox.

My Stream AC 5000 works properly with the EcoFlow P1 meter, but I would prefer to use the HomeWizard P1 meter instead. I try to avoid having to connect multiple P1 meters and accoring to the documentation and what I see on YouTube it should be possible. But I haven't been succesful yet.

I can add the HomeWizard P1 meter to the app and it appears that it initially does connect with the Stream AC 5000. It finishes the proces of connecting, but then it proves it is not connected.

Opening the HWE-P1 in the app shows an error message in red "connection broken". Can you please guide me?