Game Crashes with new client

One day I was playing league and it crashed. When it crashed, It would not let me get on the game anymore. League of Legends client will pop up, but when I push the play button to get into login screen, it just goes away. I have tried repairing it at the first screen. I have also tried uninstalling and reinstalling multiple times. I don't understand why the old client worked and the new one does not!

Any help would be appreciated!