Electronic child lock fault

[Brodger3]

Hi. Brand new 6.1 Beach. Intermittent message when I use the Electronic child lock. The error message flashes in the dash. A couple of pushes of the button in the door clears it and then the button lights up. The child lock is on when it is lit up so it is okay for the kids. Out of interest on my T5 it had manual locks on each sliding door. On the T6.1 these are blanked off with a rubber stopper. Not sure if the change is a positive 'upgrade' yet. I have contacted dealer but no reply yet

Any ideas what causes the fault message ?