What I did and this fixed my issue, All you have to do it Load up another user. I Created aother user, Signed in with old PSN account and did everything, it showed the friends on that account, I then logged out of that profile and signed into my actual one ( The one with the original issuses) It loaded up the friends list. Hopefully this worked for you.
- Log out of Profile
- Create new user/profile
- Sign in with old PSN or create new one
- Sign in and complete all steps ( Friends list should show up on that account)
- Sign out of that profile
- Log back into Original Profile
- Should load your friends list up now.