I've had a problem for a few months now where I can't see the leaderboards. I've tried connecting to Facebook and my email address that I registered with but without any success. I also can't create a new login using one of my other email addresses. In each case it says "There was a connection problem. Please try again in a bit" but that's been happening since the problem started. I now have a new phone and used Samsung Smartswitch to transfer everything across to my new phone. All of my other games have retained the level that I was on except Candy Crush Soda Saga. That has gone back to the very beginning. Very annoying!!
I have the same problem (which started at the same time) on my Samsung tablet with AlphaBetty Saga where I can't connect to Facebook or my email login, can't see leaderboards and can't spend the gold bars that I have.
Where is my progress held on Android? It must be on the phone somewhere because if I play Candy Crush on that phone I am on level 2011 but as I said, the new phone starts from scratch.