Issues running the script

[cynwulfvan]

I'm having issues getting this script working on my terminal. It's possible I'm missing something really basic with my use of Terminal/Python3/Github, and I could use some help.

me@M1Air twitter-123 % python3 twitter-export-image-fill.py

Twitter export image fill 1.10
by Marcin Wichary (aresluna.org) and others
use --help to see options

Traceback (most recent call last):
  File "/Users/me/Downloads/twitter-123/twitter-export-image-fill.py", line 427, in <module>
    make_directory_if_needed("img/avatars")
  File "/Users/me/Downloads/twitter-123/twitter-export-image-fill.py", line 114, in make_directory_if_needed
    os.mkdir(directory_path)
FileNotFoundError: [Errno 2] No such file or directory: 'img/avatars'

Or when I skip-avatars to bypass that error:

me@M1Air twitter-2023-07-25-123 % python3 twitter-export-image-fill.py --skip-avatars

Twitter export image fill 1.10
by Marcin Wichary (aresluna.org) and others
use --help to see options

Could not open the data file!
Please run this script from your tweet archive directory
(the one with index.html file).

I couldn't find index.html anywhere, so I tried running the script from several locations within the archive just in case, with no success. Have I placed twitter-export-image-fill.py in the right location? If so, what can I do to find the problem?