Can't log in because of some error.

Yo guys, i hope someone can help me with this, because it's really stressing me out.
Every time I try to open the CF client to just play some games, i get this error:

I have never seen this before in my life and its extremely annoying. I am a Major at the moment and its the first time i've ever seen this. It sucks because it won't let me log into CF!

It doesnt make any sense either because my internet connection is perfectly fine!