Not many specs available, but it seems to be a brushless direct drive hub motor. Obviously it should rotate when applying power. These type motors usually do this with magnetic sensors in the motor (hall effect sensors) that tell the motor controller when to pulse the power to make the motor rotate. Sounds like one or more of the sensors, or the controller itself, aren't working correctly and the controller is applying continuous power making the motor making it feel like it locked up rather than rotating.
My first thought is a loose connector. If these are easily accessible I'd suggest unplugging every connector you can find and then reconnect them firmly. If this doesn't do it I'd suggest warranty service. If this isn't available, depending on your DIY skills, you can troubleshoot the hall effect sensors and motor controller.
As a suggestion, you might get more focused feedback on this product on scooter specific forums like those hosted on Endless Sphere and others.
Good luck.