Seems like a darkflow issue. Did you try solving it like in #849 darkflow issue?

the solution of JaronrH I got stuck at number 6 and that was the error:

D:\custom code\YOLO-Object-Counting-API>setup.py build_ext --inplace
Traceback (most recent call last):
File "D:\custom code\YOLO-Object-Counting-API\setup.py", line 3, in
from Cython.Build import cythonize
ModuleNotFoundError: No module named 'Cython'

Even though all requirements already were satisfied in points 3,4,5

can you tell me all the modules that I should install even before the getting started section ? (with their cmd install commands ?)

Have you tried all 3 options described in Getting started section of the Readme??

option 1:
D:\custom code\YOLO-Object-Counting-API>python3 setup.py build_ext --inplace
Python was not found; run without arguments to install from the Microsoft Store, or disable this shortcut from Settings > Manage App Execution Aliases.

option 2:

and option 3 as above

Maybe try using anaconda and replace python3 with python?

D:\custom code\YOLO-Object-Counting-API>python setup.py build_ext --inplace
running build_ext
copying build\lib.win-amd64-3.8\darkflow\cython_utils\nms.cp38-win_amd64.pyd -> darkflow\cython_utils
copying build\lib.win-amd64-3.8\darkflow\cython_utils\cy_yolo2_findboxes.cp38-win_amd64.pyd -> darkflow\cython_utils
copying build\lib.win-amd64-3.8\darkflow\cython_utils\cy_yolo_findboxes.cp38-win_amd64.pyd -> darkflow\cython_utils

but when running the count_cars_crossing_virtual_line.py this error occurs:
PS D:\custom code\YOLO-Object-Counting-API> & C:/Users/Owner/AppData/Local/Programs/Python/Python39/python.exe "d:/custom code/YOLO-Object-Counting-API/count_cars_crosing_virtual_line.py"
Traceback (most recent call last):
File "d:\custom code\YOLO-Object-Counting-API\count_cars_crosing_virtual_line.py", line 2, in
from object_counting_api import ObjectCountingAPI
File "d:\custom code\YOLO-Object-Counting-API\object_counting_api.py", line 1, in
from darkflow.net.build import TFNet
File "d:\custom code\YOLO-Object-Counting-API\darkflow\net\build.py", line 1, in
import tensorflow as tf
ModuleNotFoundError: No module named 'tensorflow'

Did you try installing tensroflow?

pip install tensorflow?

requirement already satisfied in the cmd but somehow when I run this count_cars_crossing_virtual_line.py the error above happens, also I tried adding imports in that file still same error but I might have an idea what is your running environment in vscode? my current one is: C:/Users/Owner/AppData/Local/Programs/Python/Python39/python.exe I tried using different environments but had more errors than just: ModuleNotFoundError: No module named 'tensorflow'

everything is installed correctly and option 1 in the read me file worked problem is when running this: C:/Users/Owner/AppData/Local/Programs/Python/Python39/python.exe "d:/custom code/YOLO-Object-Counting-API/count_cars_crosing_virtual_line.py" this error appears: "ModuleNotFoundError: No module named "tensorflow" even though tensor flow is installed correctly in the comment above is there anymore modules I should install in order to get the counting to work (before even the getting started part in readme) ?