VS Code: "Key error" or debug error: "connect ECONNREFUSED 127.0.0.1:5678"

[Captain-Science]

I've been hacking at this for months so I decided to call for help.
BTW the VS Code lintr has quite a few complaints as well--mostly about unused import/from

$ python main.py artwork

there are 2 users

download artworks for user smith

Traceback (most recent call last):
File "C:\DevProjects\deviantart-scraper-master\main.py", line 59, in
main()
File "C:\DevProjects\deviantart-scraper-master\main.py", line 44, in main
download_users(api, config, args.option)
File "C:\DevProjects\deviantart-scraper-master\main.py", line 14, in download_users
result = api.save_users_artworks(config.users, config.save_dir)
File "C:\DevProjects\deviantart-scraper-master\lib\deviantart.py", line 191, in save_users_artworks
files = self.save_user_artworks(user, dir_path)
File "C:\DevProjects\deviantart-scraper-master\lib\deviantart.py", line 181, in save_user_artworks
files = pool.map(partial(self.save_artwork, dir_path), artworks)
File "C:\SoftwareDevelopment\PythonPython39\lib\multiprocessing\pool.py", line 364, in map
return self._map_async(func, iterable, mapstar, chunksize).get()
File "C:\SoftwareDevelopment\PythonPython39\lib\multiprocessing\pool.py", line 771, in get
raise self._value
File "C:\SoftwareDevelopment\PythonPython39\lib\multiprocessing\pool.py", line 125, in worker
result = (True, func(*args, **kwds))
File "C:\SoftwareDevelopment\PythonPython39\lib\multiprocessing\pool.py", line 48, in mapstar
return list(map(*args))
File "C:\DevProjects\deviantart-scraper-master\lib\deviantart.py", line 155, in save_artwork
download_url = self._download_url(artwork)
File "C:\DevProjects\deviantart-scraper-master\lib\deviantart.py", line 112, in _download_url
url = next(a['src'] for a in artwork['files'] if a['Art_type']=='fullview')

KeyError: 'files'