how to fix TypeError: expected string or bytes-like object ?

[Bo YU <tsu.yubo@gmail.com>]

hi,
(maybe this is off topic on this list)
When I want to run sphinx cmd on my pc, I got the error:
```
vimer@dev:~/build/rfs/packages/test_dir$ cat /tmp/sphinx-err-etgbo9tg.log
# Sphinx version: 4.5.0
# Python version: 3.10.7 (CPython)
# Docutils version: 0.17.1 release
# Jinja2 version: 3.0.3
# Last messages:

# Loaded extensions:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/sphinx/cmd/build.py", line 272,
in build_main
    app = Sphinx(args.sourcedir, args.confdir, args.outputdir,
  File "/usr/lib/python3/dist-packages/sphinx/application.py", line
220, in __init__
    self.preload_builder(buildername)
  File "/usr/lib/python3/dist-packages/sphinx/application.py", line
297, in preload_builder
    self.registry.preload_builder(self, name)
  File "/usr/lib/python3/dist-packages/sphinx/registry.py", line 142,
in preload_builder
    builder_entry_points = entry_points(group='sphinx.builders')
  File "/usr/lib/python3/dist-packages/importlib_metadata/__init__.py",
line 1047, in entry_points
    return SelectableGroups.load(eps).select(**params)
  File "/usr/lib/python3/dist-packages/importlib_metadata/__init__.py",
line 477, in load
    ordered = sorted(eps, key=by_group)
  File "/usr/lib/python3/dist-packages/importlib_metadata/__init__.py",
line 1044, in <genexpr>
    eps = itertools.chain.from_iterable(
  File "/usr/lib/python3/dist-packages/importlib_metadata/_itertools.py",
line 16, in unique_everseen
    k = key(element)
  File "/usr/lib/python3/dist-packages/importlib_metadata/__init__.py",
line 961, in _normalized_name
    or super()._normalized_name
  File "/usr/lib/python3/dist-packages/importlib_metadata/__init__.py",
line 628, in _normalized_name
    return Prepared.normalize(self.name)
  File "/usr/lib/python3/dist-packages/importlib_metadata/__init__.py",
line 883, in normalize
    return re.sub(r"[-_.]+", "-", name).lower().replace('-', '_')
  File "/usr/lib/python3.10/re.py", line 209, in sub
    return _compile(pattern, flags).sub(repl, string, count)
TypeError: expected string or bytes-like object
```
The problem may be in importlib_metadata here, but I am not sure how to fix it.
I remembered I do `python setup.py build/install` something ago.
Any help is welcome!

BR,
Bo