I had this yesterday but managed to get it to work. What I did was I restarted my PS4 and then before I tried to launch the game again, I pressed the Options button and selected "Check for Update". This told me there was no update available but upon launching the game, the launcher did actually patch itself this time. This allowed me to download the game patch after logging into launcher. Try doing the same and see if it helps? I hope it works for you too!