I don't even know what this is

https://s21.postimg.io/rzmhnnj7r/Untitled.png

I just Qued up for a rank game when all of a sudden my client well got dark, I could still move and select things but the fact that I could not see all together made me have to dodge yet even after the dodge it remained as it appears in the image making me have to close my client altogether, it does not really matter since I was not in promos or anything but it would have really sucked if it happened again