According to AdAge, advertisers were also locked out of Facebook's ad manager. A short time later, Facebook indicated the outage was not related to an attack aimed at overwhelming the network.
Facebook finally tweeted - two hours after they started having issues. The site Down Detector reports issues all over the world.
Huawei criticizes USA pressure on Berlin over 5G tech
The year ended with the arrest of Huawei's chief financial officer in Canada at USA request, to the consternation of China. Among other things, European security agencies have relied heavily on USA intelligence in the fight against terrorism.
"We are now experiencing issues that may cause some API requests to take longer or fail unexpectedly".
As for Instagram, those attempting to access the social platform have found that it simply doesn't load or refresh. But Facebook now has billions of users across its services, many of whom rely on the company's apps for daily communication.
While there has been speculation that the site may have been targeted by a distributed denial-of-service (DDoS) attack, the firm said this is not the case. Others are just reporting problems with the newsfeed or login areas.
While desktop versions aren't even loading for many users, apps do load the content, but you can't post new status updates or send / receive messages. Many said their Instagram stories are crashing and there are glitches while logging in.