February 2018 - last edited February 2018
Without Wifi or LAN connection it works normally but if connected to WiFi or LAN, the error code appears everytime. T T
February 2018 - last edited February 2018
Do you have a "normal" internet connection i.e. not any kind of restricted network such as corporate/military/University?
Do you have an active PS+ subscription?
Close the application, install the latest System Software and game updates and restart the system.
https://www.playstation.com/en-ie/get-help/help-library/error-codes/ce-34878-0/
May 2018
September 2019