Leaderboards issues

Leaderboards aren't working in the production version :

Hi, my game went live today, and the leaderboards aren't working in the production version.
I have tested them in the sandbox and they appeared to be fine.
The game center UI loads fine, but no leader board data is shown, only - no challenges.

Solution1:

Make sure that you've attached your leaderboards to the build you are currently testing with iTunes Connect.

Solution2:

Delete Test Data on iTunes connect.

Can't show leaderboard by its id.

When I am trying to show a specific leaderboard by id but the leaderboards page appeared instead.

Solution:

This is a known bug with the IOS9+. Unfortunately, we can do nothing about it, just have to wait until apple fixes it.  See the related topics on stackoverflow and Apple developer forums.