Car Will Not Start problems of the 2018 Toyota RAV4

While driving on Saturday morning 9/29/18, I stopped at a stop light and my 2018 Toyota Rav4 lost all engine power while in traffic. The computer video screen showed the message "charging system failure\malfunction". I then attempted to restart the vehicle and it did not crank over, I waited a few seconds, made another attempt , the vehicle started. I pulled over and parked the vehicle, looked up the error message in the car manual and it instructed me that it was a serious problem and to take the vehicle immediately to the nearest Toyota dealer. I then took the vehicle to my local dealer, they ran a vehicle diagnostic report, they found no error messages or voltage problems with the vehicle. They offered no reason for the loss of vehicle power. The service manager stated that they could only diagnose the vehicle so far and that they would need "corporate" to send someone out to do further diagnostics on the black box. On 10/1/18, I opened a problem report with Toyota USA and was given a case#. .