I kept getting error code NP-32091-5 for about a week straight with every game i booted up on my ps4, the games would work the second time i loaded ‘em up so i just played through it until i noticed i wasnt unlocking trophies that should have unlocked
So i then looked into it, i rebuilt my database but that didnt fix the issue, so then i backed up all my saves, deleted my main user tied to my account, and had to make another user, tethering it to my psn profile and it fixed the problem
Another user had a similar issue and thinks it might be due to having too many games installed on your drive, i currently have 120 games installed on my (not filled up, mind you) 4TB external hard drive
He was in the same boat
Anywho, if you hit this error on your ps4
Thats the solution!