The operation could not be completed - "An unknown error occured (-42587)

Hi All

I have recently joined the Apple Music Family and have being enjoying the Millions of songs been made available to me.

Recently, I have been unable to play music made available on the Apple Music store- only music which I have downloaded. I am already a member of Apple music as it recognizes my previously downloaded playlists.

When I try to play a song not purchased from The iTunes store I get the following message. "An unknown error occurred (-42587)

Can someone please assist.

Apple iPhone 5s ( iOS 8.4.1)