I’m having the same issue with an older version of Volumio (2.029, 2.5x didn’t work fine with my Hifiberry dac)
I have two RPI both via Wifi connected on the same network. When I started up the second installation it changed to Volumio-2 but I went and fixed it myself to Volumio-Amp (it’s got a Hifiberry Amp). They work fine but the multiroom does that same broken graphic thing and when clicking on the “other” Volumio, it just hangs with the spinner… forever…
