Game Crash

"Unable to connect to the server. Please check your network connection and attempt to reconnect to your game."

This has been happening last few weeks, and I can't do anything until the game is finished. Don't want to get banned for being AFK when its the game's fault.

Checked firewall and even made sure that league was specifically allowed through the firewall.

Anyone know how to fix this, it's starting to get ridiculous.