Looks like more issues on Sony's end again.... may have something to do with it.

https://downdetector.com/status/playstation-network

IF this is a "normal" home installation, disable port forwards. You should only need that to get through firewalls you typically see in the workplace or university campus. Disable UPNP on the router, then go into the PS4 nmenus and run a connection test to see if it clears up some issues that may be there.