Black screen after champ select, nice.

Hello,

I'm getting a black screen after my champion select. My screen just stays black, and after a few seconds an error pops up, saying I have to reconnect or cancel. I've tried to enter several games, and now I got a huge penalty on my head for ''afking'' while I can't even play the game. Spectating games works fine though. My internet is not the problem, because I can play other games perfectly. Disabling my Firewall doesn't fix it, and changing properties of my LoL client neither.

Please fix this asap.