Car Rotate Crash

Hello, I was using Edit Stage to rotate a car, when suddenly, "Alice has encountered a exception." It wouldn't send the error report. I was using the grassy template included, with a custom made boy called WilliamEnglish. He was wearing a red shirt, blue jeans, was on Whiter skin, had brown hair with the second option, was 75% in shape, and also was defined twice, first time with third skin color. He would turn to the camera, look startled, turn around with Left 0.5, and move forward that way, while doing "jogInPlace". The car wouldn't do anything so far, and was rotated to the horizon.
Please help! I was using 3.0 Beta!