That's not an error in the title you've just read - Facebook itself was responsible for the Facebook outage last night. Apparently there wasn't any sort of hacking going on, nor did the end of the world come close to happening - instead it was a tiny glitch. This error happened, according to Facebook, when they "introduced a change" that affected their configuration systems. This includes Instagram too. Both services should be back in action 100% for users around the globe - if not, count on another statement arriving shortly.