Season Pass Issue (Batman: Arkham Knight)

I bought Batmanâ„¢: Arkham Knight Premium. When I click on the season pass in the game menu, when I press enter, the steam window pops up with the season pass page. On this page, you can see that the season pass has been purchased, but when you click the play button, nothing happens. What do I need to do to be able to play the expansions? I reinstalled the Season Pass to no avail.