[CLIENT] [CRASH]

I update the new client and now i can't play: I start trying to play classed game and after everybody choose characters, client start to launch the game as usually then a text box saying critical error appeared. I try to restart the application but nothing more, again the same message. Then I try an ARAM game and again after having chosen characters, and game starting, the text box appear. Three times i have to wait the end of the game to be able to launch an other one … and have the same problem

Text box: "A critical error has occurred and the process must be terminated. Would you like to create a crash dump to aid the developers in troubleshooting this issue? This may take up to 5 minutes. NOTE: The process may appear unresponsive for this time."