I can't sign in to Groove music on my Android device, why do I get an error message every time I try to sign in?

[WPCentral Question]

I can't sign in to Groove music on my Android device

I can't sign in to Groove music on my Android device. I successfully put all of my music on OneDeive. It all synced correctly. I just get an error message every time I try to sign in.