Was it a cold morning when this happened? had it been a while since the car has been run? you say the car fired up OK, my first thought would be the battery is a little low. If the car had not been run for a while the charge in the battery could have dropped off a bit, possibly just enough to start the car but not kick in the electrics properly. My old polo used to have this problem. Loads of places do free battery test to see if it is on its way out.
I’d also simply have a look at the battery connnections, one could be a little loose and with the vibration of the engin turning over it could have caused an intermittant loss of power for the electrics.
Well that is my guesses any way, simple and free to check out.