Same exact thing happened to me. I knew that there was a new update and i wanted to update so you do clear chache and it just does "Update Failed" after i do clear chach and i try to start the game.
The same thing happened to me. I wanted to update so i went and i did a clear cheche or the thing that is like that in the options. And now it just wont update it just does "Update Failed" and how do you fix it?