2017 2.3l T/Diesel Dual cab 4x4 Auto NP300 - Central locking issues with passenger side door.

[Neale]

My above vehicle's passenger front side door won't lock or unlock either with the central locking button on the key or the driver's side door central locking switch. Does anyone know what that could be and if it's an easy fix. I have already pulled the driver's side door trim off but would like to know exactly what I need to do or replace before pulling anything else apart.