the title speaks for itself
Thanks for reaching out.
Chromecast setup on a computer is no longer supported. To set up Chromecast, you need to use a mobile device. Check this article for more information.
Still need help with this? Have you had the chance to visit the link I shared above? Let me know by updating this thread and the Community will be happy to lend a hand.
Due to inactivity, I'll go ahead and lock this thread in 24 hours. Feel free to start a new thread if you need assistance with your Google speakers and we'd be glad to assist you further.
Google Nest Help Center
Chromecast Help Center