It literally explains it in the article. > The car’s owner, Renee Sanchez, was taking her granddaughter to the zoo, but after loading the child in the Model Y,

It literally explains it in the article. > The car’s owner, Renee Sanchez, was taking her granddaughter to the zoo, but after loading the child in the Model Y, she closed the door and wasn’t able to open it again. “My phone key wouldn’t open it,” Sanchez said in an interview with Arizona’s Family. “My car key wouldn’t open it.” She called emergency services, and firefighters were dispatched to help.