All the installation follows this website: https://robocademy.com/2020/05/01/a-gentle-introduction-to-yolo-v4-for-object-detection-in-ubuntu-20-04/
However, it doesn't work whenever I want to operate this line: ./darknet detect cfg/yolov4.cfg yolov4.weights data/person.jpg
And it always shows like thisenter image description here