Crash After Champion Select?

Recently, i have been trying to get into a league game. I've gotten into champ select, but after it black screens and says league has crashed, and say"s... "Unable to connect to the server. Please check your network connection and attempt to reconnect to your game" Two buttons "Retry, and cancel." I retry and it keeps saying the same thing. This has been happening for 3 days straight, i don't know how to solve this. Any solutions?