When you hit multiplayer, if it doesn't display your stats, hit the 'back' button then hit 'multiplayer' again.
If that doesn't work, turn off your router for a minute or two then turn it back on and try again.
If that doesn't work, uninstall and then re-install the app and try again.
When that happens, your connection to the server is unstable and the server is struggling to find your records. It happens to me occasionally and doing the above usually sorts it out.