I just took mine into dealership for exact same fault "Vehicle control system fault" and im also on the R40 my23 Trophy with a 4 day old car.. possibly software then I hope but left it with dealership to investigate. Did yours get resolved?
Just to update you on mine, I got it back from MG after 2.5weeks. They initially couldn't find much other than checking all connections and resetting things (probably reconnecting battery like others said).
However, they did eventually agree to update several modules in the car after finally getting approval from MG (testing their loan car on the same chargers they thought might be the problem, without any errors helped I think). I did also ask them to update the infotainment as my Bluetooth kept asking to reconnect- now on R46, but they didn't think that would affect this error at all, rather one of the modules in the car needing an update, which is now done.
So far so good, no more errors or issues with chargers but its only been 5 days so far (longer than I originally had car at least).
