Exactly the same issue. Tried deleting, reinstalling, relinking, resetting up network connections on PS4 etc etc.
PS4 media player can see the Plex shared items on my network, so can Sony tv. Plex on my iOS devices is working fine too… just not Plex on PS4.
Gets stuck on grey screen with spinner / loading icon. Unresponsive. Occasionally lands on plex home screen but totally unresponsive (control via DualShock does nothing).
Hope this gets sorted soon. Plex on PS4 is the reason I pay for it.
