Game Window Wont Launch After Lobby

So yesterday i was able to play Summoners Rift, draft pick, ranked, just like normal, no problems. This morning, after everyone selects champs and timer runs out, the screen will flash like it attempted to bring up the actual game window but then immediately closes and all i am left with is the client window with the reconnect button. No matter how many times i click the reconnect button it just repeats. flash then close, flash then close. Restarting client or my computer has not solved this issue. Please help