Either the disc is dirty or your bluray player lens is dirty as that's the usual problems associated with that error code. Since you say you never use physical games the latter may have been the problem since dust may have gotten inside the console due to the disc drive slot always being empty.
Really? Then why did all my other games and PS4 features still work just fine at the time? Anyways, I'm not getting the error anymore. I've been playing and enjoying the game now.