It happened to me for the first time today, i don't know what to do or how to fix it. the bug is thatwhenever i try to connect to a game or I press reconnect it gives me this sound and it automaticly closes the game, bringing me back to the league client with the reconct button ... it also gives me this thing, idk what that is .. https://imgur.com/qQaOdNS
I had a similar problem. I learned that graphics drivers may be to blame. If you run 2 or more monitors the easiest solution is to unplug one, and reload your computer. It could be a graphics driver incompatibaility as well so while it could work on one it might do poor on another. I was told AMD is having a huge issue. My problem was I occasionally run 3 screens to duplicate my main monitor. That frequently causes me league of legends crashes, but it didn't crash my computer [which league +3 screens does do] because I unplugged it before launching league [but not restarting my computer] and instead it wouldn't load client at all. See if this solution works. If not, then the answer doesn't apply to you. If you're running 2 screens and streaming it may also apply to you. Basically in my case it wasn't AMD but the Nvidia Graphics Controller not working well with the league of legends client.
