Bike pedals not moving for upright position I need the help with my bike. When starting a bike (stopped position), I cannot move my pedals to the upright (power) position before starting. When I stopped in the traffic light, I need to move my bike to return my pedal to the upright position. I wanted to ask if it is normal for some bikes or there is a problem with the bike.

I suppose it is not fixie. Correct me if I am wrong. Is it possible to get it changed?
Since you don't mention that you don't have a fixie where this wouldn't be possible anyway, if your bike's rear brake has a back-pedalling aka coaster brake, turning the crank backwards is indeed not possible. It is system-inherent.