The error that this, in the attached photo, person is making in approaching this vehicle is that; instead of the person approaching the vehicle from the front, he or she is approaching the vehicle rare.
Explanation:
When approaching a vehicle in the process of crossing the road, it is advisable that one approaches the vehicle from the front rather than the rare.
This is because, by approaching the vehicle from the front, then the driver shall be able to easily and immediately see you thereby responding accordingly compared to the rare where, he or she might not see you and thereby result in an accident.