Game crashing after champion select

Just as the title says, the screen goes black after champ select and then I get an error saying there was a problem connection to the server. I've tried reinstalling, fixing the files, renaming logitech files, nothing works. I've tried multiple game modes, none of them work. I don't this this has to do with my specs at all, I can run games such as Blade and Soul just fine. LoL used to work just fine but now this keeps happening, and I'd really love to get back to the game.