I am trying to connect to my nest hub through Home Assistant Cast, I have a Nabu Casa Account so I am using that and all I get in the screen is a message saying:
“Cannot show lovelace because we are not connected to the same home assistant instance”
Anyone has any idea what’s going on?
I have the same error, but I am using an NGINX proxy to terminate TLS instead of Nabu Casa.
I have Google Assistant and Alexa integration working well along with external access via the mobile app.
My Google TV shows the 
and “Connected” when the cast starts, but when I “pick a view” I get the same error as the OP.
