I want to connect my chromebook to my phone, but it wont work

I press connect with code, my phone's screen does not change. I used QR code, but the same result. Also, my phone's IP address says error.

Is the phone connected to Wifi? Usually it will only show an error if it is not connected. If you're on Android, it is possible to use the phone over cellular, but you must leave "Use legacy connection" unchecked otherwise the connection won't work.