2020 Mini Cooper S Electrical problems

During a rain shower, drove at about 15mph into roughly 4" of water gathered on the shoulder of an access road adjacent to the highway and the engine stalled. Would not restart. Puddle of water was not high enough to breach the cabin - running boards were still above water and the curb adjacent to the street was not submerged. Car would not start and transmission locked up. Bmw roadside assistance contacted and advised not to start; tow truck had difficulty loading onto the flatbed because the electrical system had malfunctioned in the electric convertible top and was overriding the ability to put the car into neutral. *Tr