So the Lumin app is not working on my I phone or my Mac book. it used to. What am I doing wrong? Thanks
Trying deleting and reinstalling the app, that usually fixes any local problems.
Please power cycle the whole network of devices starting from the router, including WiFi access points, network switches, Lumin, Roon Server, iPhone, iPad, MacBook.
You must grant Local Network access to Lumin app. In MacBook, turn off firewall.