If none of these methods resolved the GTA Online Unknown Network Error, then it is best to raise a ticket with Rockstar Games and let them handle the situation.

Last night, Sony addressed complaints that users were unable to download GTA V, saying "for those of you experiencing error code 80029564 when downloading or ...

If you’ve come face-to-face with the dreaded 80029564 error code during the installation of GTA V from PSN you’ve no doubt been banging your head up the wall with frustration.