Loot and Crafting Inventory issue (Client)

Hi,

I have a black screen when I try to reach the loot and crafting inventory screen (Client). Can't see or click anything in that page, just black. It started yesterday just after I won a chest. The client is still working. I want to open that chest!!

http://s15.postimg.org/wy4v0aqyj/lol_inventory_and_loot_bug.jpg