Motor does not work after replace rear inner tube
I got a problem with my folding mijia qicycle. I just got it back from bike repair shop which I got the screw on my rear tyre and changed the inner tube. Now my bike does not work properly. All the electric functions work well except the motor. When I ride, in the computer display everything fine except the WATT still zero. What's the problem? How can I fix it. I assume that because of torque sensor maybe which I didn't touch it but not sure for the shop mechanic. Thank you very much.