[CLIENT] Screen goes black whhen entering champ select

After queuing for a ranked solo queue game, I hit accept. The queue was surprisingly fast. After hitting accept, my screen went black. I could still see the border of the client, with the chat tabs, friends buttons, etc. The rest of the screen was black. When trying to type in chat channels, text would not appear, but hitting enter created new lines.

I have only had this happen to me once, but I have heard of it happening to others as a rare occurrence.