Spotify will not reinstall - iOS 9.1
This is on an iPad 2 with 4 gig of free storage.
In the App store Spotify will not complete installation - the circle goes around to completion, but it's never replaced with "Open". On the home screen there is an icon which is obviously it; it shows a circle showing about 5/8 complete, and it says "Installing" underneath. If I hold my finger on it the deletion "x" appears, but nothing happens when you click it. I don't know what to do. Rebooting doesn't fix it.
iPad 2, iOS 9.1