You can check if that’s the cause of your PS5 error code WS-116439-4 by disconnecting other devices from your wifi or router. Wifi signal interference.

PS5 Error Code NP-103105-0, How To Fix The following steps are known solutions to this PS5 error code, so give them a try.

For solving this PS5 error, you need to connect your console to the Internet and update the system to its latest software release. As mentioned, the steps are identical to NP-102945-1.