As title says. Game crashed during middle of league event (ikr!!) to desktop. No error messages given. I'm not sure how to access log files if there were any generated. This has happened once before in multiplayer earlier but i didnt pay any attention to it (dammit).
Next time this happens then go into Windows Event Viewer and check if there is an event with the exact time of your crash. Because you never know if it solely is AMS2 that is the cause.
It's really likely that the game isn't to blame, there are sometimes issues caused by other programs interfering (your antivirus, some background app, a program that's downloading an update), and that's pretty hard to prevent for any game.