Sorry if this has been figured out but I searched for twenty minutes and didn't find this specific answer anywhere. This morning I opened my Spotify App on Windows 10 and found I couldn't select shuffle or repeat. The buttons were there, just greyed out. I restarted the app and the computer but it didn't solve it. I would have reinstalled the app but I thought I'd open the web player for the time being and see if it worked there. It did, and the Windows 10 app that was still running suddenly fixed itself as soon as I clicked shuffle in the web app. So I just closed the web app and the native app is working properly again now.