Unable to Log-In. It says "Make sure you are online and Try Again"

This problem started yesterday, I realized I have the message "offline" in my launcher, so I log out so could log in again and fix it, but what happened next is that I couldnt log in again, and after trying to conect, my launcher says: Please make sure you are online and try again.

I can't do anything and already tried all the fixes I found on web.