It took about an hour of searching to figure out why Google Home broke support for Chromecast Audio. They apparently lost a lawsuit from Sonos and pulled the plug on it. Contrary to what Google developers suggest, the Device Utility app does not work. For anyone who still cherishes their Chromecast Audio and wants to continue using it, you can only get it to work by installing from Google Home in iOS. Hurry before they break the Apple version.