Facebook is hacked in the whole world at the moment, the social network not being functional in the desktop version or in the mobile applications, as you can already see from the attached image.
Instagram and WhatsApp Messenger remain functional at the moment, although they are linked to Facebook's infrastructure, however Facebook doesn't work on mobile terminals or desktops, so you will have to occupy your time with something else in the next few minutes.
Facebook does not go worldwide although the company has one of the best internet infrastructures in the world, the social network is generally available for very short periods of time very few times a year.
Despite this, this year WhatsApp Messenger and Instagram have often had problems with keeping the services active, so now probably Facebook crashed based on a similar problem, or maybe Mark Zuckerberg ordered a small vacation for engineers.
No matter what is the basis Facebook problems, it certainly won't be long until the social network is working again, so you have time to test iOS 9.0.1.
UPDATED: According to those from Facebook, the problem is a major one that affects the entire social network, it being under investigation for more than an hour, the Facebook platform still having problems displaying information correctly and allowing access to others.
A Facebook-wide issue means the Facebook Graph API is temporarily unavailable. We're working with our core infrastructure teams to identify the issue and will update you when we have more information.
