No connectivity (Arch/Linux 6.19.3) - Noson 5.6.15

[Stensel8]

I am not able to connect to my existing Sonos system. I've tried using cable and ethernet, but both did not conect.

I am in the same VLAN/subnet as my Sonos speakers. The official Sonos app still connects.

I tried the AUR community package as well as the Flatpak. But both of them won't connect.