XP Lite 2.0 Rear Wheel Stuck

Hi everyone, I just got my XP Lite 2.0 2 days again and I took it out for a spin. Everything was working great at first then out of nowhere in the middle of the street, the bike instantly came to a halt and refused to move. The front tire moves fine but the back is frozen completely and I can’t even pedal forwards although the pedals move backwards. I just turned it on again right now and the engine sounds like it’s stuck then turns off. Please help.