https://www.gamespot.com/articles/ps4-experiencing-issues-as-psn-is-partially-down-u/1100-6456286/

If you're having trouble on PS4 right now, including playing games, it's not just you. PlayStation Network is suffering from issues right now, Sony has confirmed, although there's no word yet on how soon they will be resolved. [Update: PSN's status page said earlier today that the service was working correctly again, but a newer update shows that every service except PlayStation Vue is having problems right now]