[CLIENT] Shop Tab "Gameplay" Problem

When I wanted to buy runes, I went into the shop and clicked the "Gameplay" tab. Nothing appeared, just the background of the client with nothing on it. The other tabs worked fine as I checked every one of them. To reproduce the bug, I hit the home button or another tab (not a shop tab) like the Summoner Profile, or the Hextech Crafting. Them I went back into the shop and hit "Gameplay" and nothing appeared again.