Traceback (most recent call last):
  File "advancement-tracker.py", line 20, in <module>
    set_path('game_dir', os.getenv('APPDATA'), '.minecraft')
  File "advancement-tracker.py", line 13, in set_path
    paths[key] = os.path.join(*parts)
  File "/usr/lib/python3.6/posixpath.py", line 80, in join
    a = os.fspath(a)
TypeError: expected str, bytes or os.PathLike object, not NoneType

Traceback (most recent call last):
  File "advancement-tracker.py", line 27, in <module>
    loaded = {'profiles': {v['name'] if v['name'] else k: v['gameDir'] for k, v in data['profiles'].items()}}
  File "advancement-tracker.py", line 27, in <dictcomp>
    loaded = {'profiles': {v['name'] if v['name'] else k: v['gameDir'] for k, v in data['profiles'].items()}}
KeyError: 'gameDir'