I have a premium account and I'm on Mac Mojave 10.14.4
Whenever I want to cast my Spotify to my Google Home speakers, it works without issue on my phone. However, whenever I try to cast from the desktop app, my speakers never show up as an option. It just shows me a learn more button on how to connect to my devices.
My computer is on the same wifi network as my speakers. I don't know how to get my desktop computer to recognize my Google Home speakers.