[Client?] Firewall Error after Champion Select

Does anyone have a fix for that error that pops up after Champion Select as you're loading into the game? I don't even use an Antivirus firewall to begin with and LoL is well within my Windows Firewall acception list.

I've been hearing alot of people having an issue with it lately for a while and despite all my games being fine earlier, this is the first I've gotten it in a while. I've tried, reconnecting, relogging, etc. Any idea on if it's something on my end (unlikely considering how widespread the issue is) or if it's on Riot's end or somewhere in between, if there's a fix for it? I usually don't have alot of connectivity issues unless it's the server or something in the middle that's affecting everyone.

Any help from a Red or someone would be appreciated since I've tried everything on Riot's Support page and I'm running a repair now.