The PlayStation Network is down. Stop me if you've heard this one before, but it's a holiday in the US and most online-related PlayStation functions are, well, not functioning. The PSN status page details the mess.
Additionally, the PSN Status page confirms that both gaming and social features are also facing problems. As such, you may be "experiencing issues related to launching games, applications, and/or social features such as trophies, messaging, or friends
PlayStation Network is experiencing issues on Friday night.
Some PlayStation 3 and PlayStation 4 users are having trouble playing games on the PlayStation Network, according to the PSN status page. Sony's most recent update, which came at 1:25 p.m. PDT
Additionally, the PSN Status page confirms that both gaming and social features are also facing problems. As such, you may be "experiencing issues related to launching games, applications, and/or social features such as trophies, messaging, or friends