Greetings,
I have encountered this issue recently, when i go to trophies to sync, the bar stuck at 0% and disappear after a while. If i manually sync then error NW-31456-9 will come up.
Then i go to Network to test my connection, everything successful except NAT Type is Failed with an error NW-31374-8. Everything else is working i can go to PS Store, can sign in PSN, chat with friends and stuffs, i dont have PS Plus so not sure about multiplayer but i just want to sync my trophies. Please help me. Thank you.
When i first bought the PS4 (1 month ago) i can sync trophies normally, i think this issue starts occur after i turned off my modem about 2 days ago, i want to cool it down a bit, after turned on again issue starts occuring.