[GAME] Lux cannot use her E at all

I was laning and threw out my E, it spontaneously disappeared and from that point on, I was unable to use my E. I disconnected and reconnected, I tried putting more points into E, but I was unable to use it for the rest of the game. This is gamebreaking for Lux as E is her only reliable source of damage!!! The E skill icon becomes blacked out as if you had not learned it yet.

Screenshot attached. http://puu.sh/jqXDi/cf9c0dcad3.png