I can no longer access the game.

When I start m'y game, I can't just launcher it but it only shows me : " please connect to the internet to download necessary files, you can play offline when the download us complete".

But m'y connection is fine and during the week I had non problèmes, also just before this happened, the quest did not show up to access the ranked matches, it said that I hab a bad network. Please help me fic this problem, I really love this game...