My One suddenly won't move when I press the gas while in D gear today. It feels like something is dragging it. Any fellow car enthusiasts know or have encountered this situation before?

Does it have a cigarette lighter socket?

Buckle up.

You're being too hesitant with the gas pedal. I sometimes experience this too, mostly when going uphill out of a garage. I think it's because I'm not decisive enough with the throttle. But in your case, it's on a flat road. If it's happening during the start, it might also be due to not being firm enough with the gas.

The door is not closed properly, and the seatbelt is not fastened.

The steel chain CVT is just like that.

There is something unclean pulling your car from the back [watch].

Did you use hill descent control when going downhill?

Maybe the door wasn't closed properly [I want to be alone].

Electronic brake not released?