I cannot play the game because when I open it, I have to download some update of less than 1 mb under..

I cannot play the game because when I open it, I have to download some update of less than 1 mb under a stable network connection. But when I tap on confirm, I get download failed! Does anyone else have these problems and know how to fix them? I just got into an association so I really need to be able to play the game so that I won't be kicked out already...