The catalogue is not created automatically

[gecube]

The catalogue _files/storage is not created automatically.

$ wayslack my-export
Note: directory will be created: my-export
API token for my-export (see: https://api.slack.com/custom-integrations/legacy-tokens): ***********
Processing: my-export
Traceback (most recent call last):
  File "/usr/bin/wayslack", line 11, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/site-packages/wayslack.py", line 916, in main
    with SlackArchive(slack, a) as archive:
  File "/usr/lib/python2.7/site-packages/wayslack.py", line 831, in __enter__
    self.downloader = Downloader(self.slack.api.token, self.path / "_files" / "storage")
  File "/usr/lib/python2.7/site-packages/wayslack.py", line 257, in __init__
    self.path.mkdir()
  File "/usr/lib/python2.7/site-packages/pathlib.py", line 1103, in mkdir
    self._accessor.mkdir(self, mode)
  File "/usr/lib/python2.7/site-packages/pathlib.py", line 346, in wrapped
    return strfunc(str(pathobj), *args)
OSError: [Errno 2] No such file or directory: 'my-export/_files/storage'

If I create it manually, the process of downloading files is successfully proceeding further.