DTC U0300-57: Internal Control Module Software Incompatibility - Invalid/incomplete software component: Action

WARNING: This page is about a different car, the 2016 Land Rover LR4, 2015 Land Rover LR4, and 2014 Land Rover LR4. However, it is still accessible from the selected car via links, so may be relevant.

Using the manufacturer approved diagnostic system, clear the DTCs and retest. Check DTCs in all control modules
In case U0300-00 set in multiple control modules on the chassis high speed CAN bus - Reconfigure the central junction box with the latest level software
In case U0300-00 set in wade aid control module only - Reconfigure the wade aid control module with the latest level software. If the fault persists, install a new general proximity sensor module