What does it mean: TypeError: expected str, bytes or os.PathLike object, not NoneType?

Question

Python

Error log:

Traceback (most recent call last):
  File "C:\Users\Ternick\Desktop\1\main.py", line 203, in <module>
    main()
  File "C:\Users\Ternick\Desktop\1\main.py", line 174, in main
    sendImage(chat_id, a)
  File "C:\Users\Ternick\Desktop\1\main.py", line 141, in sendImage
    with open(path_to_mg, 'rb') as path_to_mg_god:
TypeError: expected str, bytes or os.PathLike object, not NoneType
[Finished in 350.7s]

Description of what is wrong:
Well, the essence of the code is that it loads a module that gives it a picture, it sends this picture to me via Telegram. And errors get out at the moment of opening of a picture for the subsequent sending to it! I have already tried a lot of different options and sleep () and now I checked whether this application is open or not. Since it's all in different folders, I still don't understand why it throws a photo to me in the folder with the main application, although it should save it to the folder with the downloaded file!

Answer 1

The error says that it path_to_mgstores in itself None, that is, there is nothing there.
And Python expects that there will be, for example, a string (str) or a PathLike object, which you can read about in the official documentation