The top (pinned) post in this forum should
explain:https://www.googlenestcommunity.com/t5/Streaming/Regarding-an-issue-with-Chromecast-2nd-gen-and-Chromecast-Audio/td-p/686992
If you roll the date back on your phone and re-add the device in the
Google Home app, it will work. There are also workarounds using third
party tools that will allow you to start streaming until a fix is made.
I used the workarounds in this post.
