[CRASH] General Bug when playing a normal game

Today I wanted to play a normal game league. Everything went normal until I got to the loading screen, it was black and after a few seconds a message about my firewall blocking the connection showed up. I tried to reconnect a few times, it didnt work. After I restarted my computer the reconnect screen was gone and the game didnt show up in the match history like I never started it.

I hope this report helps to fix this error.