My system works fine on my iPhone but when I try to access it via the app on my wife’s iPhone, the system doesn’t exist.
It’s the same problem regardless of whether I sign in on my own account or my wife’s account. It asks me to update my network settings or setup a new system. The former fails and I don’t want to risk the latter in case it ruins my existing system, fixed by Sonos expert earlier today.
This has never been a problem until now as we’ve both been able to access the same Sonos system independently from our iPhones by signing into our individual accounts.