Would you be willing to answer a few brief questions about PlayStation Forums?
Please refer to this support article: https://support.us.playstation.com/app/answers/detail/a_id/4151/kw/80029020
Have you unplugged your router and modem for 15 seconds and then plugged it back in? See if that works.
I got connection to internet and PSN but connection speeds failed and gave this error.Despite being able to use it.I don't think I had this problem before.I'm sure.