Annoying bug

[CLIENT] Joining Game Won't Work

I've been trying to play a game for quite some time now, but whenever I try to play a game, it works fine until the champ select finishes. Then, where it's supposed to show the screen with the champs and keystones of both teams, it's just black, without the loading cursor of league. Just the normal mouse. Help??? [zombie-nunu-bummed]

[BTW I missed arurf annie and ekko b/cs of this ;( ]