In my opinion, this problem should be treated by developers, not users.
I have a signal from the router Apple goes through 2 repeaters, when I saw that the prefix does not want to go into psn, it was hard to think where the problem is.
The router has been installed quite recently, no updates have been requested, so the software is fresh, repeaters (repeaters) are working normally. In the end I'm sitting with ps4, which can not go into psn, but my destiny is ordered and can not be installed. The question is what have I to do with the user? I think that I am not unique with this problem. How to treat until I know ...