Patch 6.5 League of Legends Keeps on crashing after champion select

I can log in, do everything in the client but when I load into champion select and we start loading in, it immediately pops up that the game crashed, and every time I try to reconnect, it pops back up after a few seconds. In addition to this, I could still hear the champion select music. I lost a rank game for this and demoted. Please help I really want to play. :( I provided a video to show you exactly what happens but you cannot hear the sound because I muted it on accident. :/