Did the privacy settings change during this last update? I just popped on my PS4 for the first time since grabbing this update and got hit with a notification telling me to sign in to access features. Never signed out but hey ho. Tried to sign in and then got taken to a page that told me I had to update my privacy settings. Then I had to skip through a bunch of of set up pages for adding PS+ and Facebook afterwards so I could get on my account.
Haven't had to do that since I first added my account to the PS4 two years ago. Bit odd.