Np-34957-8 Ps4: The PS4 error code NP-34957-8 is highly probable to PSN maintenance as illustrated on the official website of Sony. This makes sense, in reality, because many people report the error alongside PSN downtime, especially if users can not log on.
However, this poses a dilemma as regards solutions. If PSN undergoes maintenance, you can not do anything, except wait for Sony to be done.
Fortunately, by going here, you can keep an eye on PSN status.
Furthermore, we found the PSN Down Detector to be as accurate (if not more) than the Website of Sony.