Board Thread:Game Discussions/@comment-206.183.28.85-20141204135147/@comment-24438936-20141204212357

Pretty sure I read about this being a problem on Google's end. I upgraded my Nexus 5 as well and had the same problem. You can still use the normal facebook app for messenger until this gets fixed (although you don't get notifications) or Bluestacks/andyroid to play k&d.