error come out "/bin/bash: line 1: ./darknet: No such file or directory" while try to Train YOLOv4 on a Custom Dataset in Darknet

[JohnJohnChiang]

Good day Sir
I have a problem while I use this "train-yolov4-tiny-object-detection-on-custom-data.ipynb"
followed all steps
and a error tell me "/bin/bash: line 1: ./darknet: No such file or directory"
would you please tell me if I did something wrong?
thanks!!

JohnChiang