Network error occurred. Response from DNS server is delayed or unstable.
Restart the PlayStation 4 system and router to refresh the network connection.
Go to [Settings] > [Network] > [Test Internet Connection] to test the connection status.
Check your Internet Service Provider's information if there is any maintenance.
If you selected [Manual] under [IP Address Settings] or [DNS Settings] when setting up the Internet connection, verify that [Primary DNS] and [Secondary DNS] are set correctly.
In some cases, the system might not have obtained an IP address yet, or any settings with DNS may have been changed. Please contact your Internet service provider for further assistance.