itunes won't sync with music in the cloud

Hello - out of nowhere, my iTunes (v12.1.2) will not sync with my music in the cloud. I am getting the message:

"The shared library 'iCloud Purchases' is not accepting connections at this time. Please try again later."

I have signed out, restarted iTunes and signed back in. No change.

"Show music in the cloud" is ON in my preferences-->store

Any help appreciated. Very frustrated to not be able to access music I've paid for. Cheers!