Sometimes when I'm about to enter the loading screen, this appears. My team enters the match with no problem at all. My internet connection is working fine, talking with friends over skype / mumble. Deactivating my firewall doesn't help. If I open the launcher to log in again it says "undefined" as server status.
Sometimes restarting my computer a couple of times help, but it takes to much time and odds are the match is already lost.
I've tried reinstalling LoL aswell as repairing it. When the game does allow me to play I have no issues at all, stable 60 FPS and 50 ping.
Any help? I'll also note that it has happened before the Fiora patch, so even if it mentions a file related to fiora I've had it mentioning nautilus as well.
E: This just gave me my third or forth leave, ever. Two of them was due to not being able to connect at all due to this error.