Client blacking out upon accepting

Upon clicking accept to play the game would blackscreen, causing me to be unable to view or interact with champ select, which in turn made me receive a leaverbuster. Screenshots: https://gyazo.com/ec2fec2fce5cbf52ac5cecf607c22cb6 https://gyazo.com/c2375feaba1e68db33108e2983789e72