The setup on your computer should have nothing to do with it.
You're not sharing an account with your daughter are you? You can install spotify on as many devices as you like for your account, but you can only stream on one at any one time, so if she is playing you would not be able to.
If that's not it, then what phone do you have? Can you sync playlists and play those or nothing at all?
Listening on Windows, Android and Sonos. Tweeting it at @davelicence