Client Crash

Starting a game of ARAM when I find a match it crashes and goes white. Can't close without task manager and when I do and boot up another ARAM game it gives me a leave penalty. I have 15 mins until I can search for another game so that's why I'm making this post. Happened multiply times and if I let it stay white and crashed it will put me in the game but i wasn't able to change runes, masteries, reroll, or leave the match cuz i wnted to, damn . Rito plz fix, ty dfg