[PROBLEM] Multiroom will not work

[traveller5712]

Hey guys,

i want to setup a multiroom system, using moode and his multiroom-function with one sender and currently two receivers.

I did use the multiroom setup guide, which comes with the multiroom configuration topic. But i could not manage to bring it into function.

This is my configuration:

Sender:
Release Information
    Release: 9.2.1 2024-12-30
    Maintainer: Tim Curtis © 2014
    Documentation: View release notes, View setup guide
    Contributors: View contributors
    License: View GPLv3
Platform Information
    RaspiOS: 12.8 Bookworm 64-bit
    Linux kernel: 6.6.62 64-bit
    Pi model: Pi-Zero 2 W 1.0 512MB
    MPD version: 0.23.14
Configuration see attachment
   

Receiver 1 (equal Receiver 2):
Release Information
    Release: 8.3.9 2024-02-23
    Maintainer: Tim Curtis © 2014
    Documentation: View release notes, View setup guide
    Contributors: View contributors
    License: View GPLv3
Platform Information
    RaspiOS: 11.9 Bullseye 32-bit
    Linux kernel: 6.1.21+ 32-bit
    Pi model: Pi-Zero W 1.1 512MB
    MPD version: 0.23.14
Configuration see attachment
   

The issue: Any time i click on discover to find my receivers, the GUI returns "No receiver found"

I've read the setup guide several times and followed any suggestion (even switch off any renderers) - but had no luck so get it running.

What i am doing wrong so far???