Static HTML export fails with AttributeError: 'str' object has no attribute 'mkdir' about slack-export-viewer HOT 5 OPEN

Mac OS Sonoma 14.2.1
Shell: Zsh
pipx: 1.4.1
slack-export-viewer: 1.3.0

Traceback (most recent call last):
  File "/Users/nathang21/.local/bin/slack-export-viewer", line 10, in <module>
    sys.exit(main())
             ^^^^^^
  File "/Users/nathang21/Library/Application Support/pipx/venvs/slack-export-viewer/lib/python3.12/site-packages/click/core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/nathang21/Library/Application Support/pipx/venvs/slack-export-viewer/lib/python3.12/site-packages/click/core.py", line 1078, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "/Users/nathang21/Library/Application Support/pipx/venvs/slack-export-viewer/lib/python3.12/site-packages/click/core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/nathang21/Library/Application Support/pipx/venvs/slack-export-viewer/lib/python3.12/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/nathang21/Library/Application Support/pipx/venvs/slack-export-viewer/lib/python3.12/site-packages/slackviewer/main.py", line 95, in main
    freezer.freeze()
  File "/Users/nathang21/Library/Application Support/pipx/venvs/slack-export-viewer/lib/python3.12/site-packages/flask_frozen/__init__.py", line 179, in freeze
    return set(page.url for page in self.freeze_yield())
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/nathang21/Library/Application Support/pipx/venvs/slack-export-viewer/lib/python3.12/site-packages/flask_frozen/__init__.py", line 179, in <genexpr>
    return set(page.url for page in self.freeze_yield())
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/nathang21/Library/Application Support/pipx/venvs/slack-export-viewer/lib/python3.12/site-packages/flask_frozen/__init__.py", line 150, in freeze_yield
    self.root.mkdir(parents=True, exist_ok=True)
    ^^^^^^^^^^^^^^^
AttributeError: 'str' object has no attribute 'mkdir'

Access to localhost was denied
You don't have authorization to view this page.
HTTP ERROR 403

Request URL:
http://localhost:5000/
Request Method:
GET
Status Code:
403 Forbidden
Remote Address:
[::1]:5000
Referrer Policy:
strict-origin-when-cross-origin
HTTP/1.1 403 Forbidden
Content-Length: 0
Server: AirTunes/750.14.1
GET / HTTP/1.1
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9
Cache-Control: max-age=0
Connection: keep-alive
Host: localhost:5000
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: cross-site
Sec-Fetch-User: ?1
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36
sec-ch-ua: "Not_A Brand";v="8", "Chromium";v="120", "Google Chrome";v="120"
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: "macOS"