I have the Chromecast 2 (round). If I go online I can cast content onto the TV. But when I click a computer file, then click "cast this file", after a few seconds it says, "no devices found".
I can open up the app on my home screen and it opens and correctly displays the name I gave it when I installed it "Living room"
this was working in the past- a couple of months ago. I've tried to Reboot the device, restart the computer, drag files to the Chromecast icon on Google Chrome.