Cannot add music to library on any device

The other day I was adding music from Apple Music to my library on my mac, and after a couple of successes, it started not working. I click the "Add" button, or choose from the menu. Everything turns gray for a moment and nothing happens. This is happening for any track. Essentially the same thing on all my ios devices. Nothing happens. I have signed in and out of itunes and the cloud, but no change. Any thoughts? Thanks!