Audio zone has disappeared and I can't relink

[Suedkiez (Just a fellow user like you)]

May be the issue and solution from this pinned topic:

macOS Sequoia Roon Server / Device Connectivity Issue, Roon Status & Workaround

The Issue macOS Sequoia (version 15), has tighter (and more obfuscated) network security settings than preceding macOS versions. This is causing problems during Roon updates; despite being previously enabled during the Roon installation MacOS, after an update MacOS is denying access to the network (yet retains displaying all is well). Roon Status Roon support and product team are aware and are working a fix, which I understand is quite involved (I have no timeline for that, sorry). The Workar…