4-10 강의부분 터미널에 pip install flask pymongo dnspython requests bs4 다운받을때 오류가 생깁니다.

어느부분의 오류인지 모르겠어요!

작성한 코드 및 에러 메세지

summer@DESKTOP-8V0Q2KV MINGW64 ~/Dropbox/PC/Desktop/sparta/projects/03.pedia

$ pip install flask pymongo dnspython requests bs4

ERROR: Exception:

Traceback (most recent call last):

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\cli\base_command.py", line 216, in _main

  status = self.run(options, args)

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\cli\req_command.py", line 182, in wrapper

  return func(self, options, args)

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\commands\install.py", line 324, in run

  requirement_set = resolver.resolve(

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 183, in resolve

  discovered_reqs.extend(self._resolve_one(requirement_set, req))

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 388, in _resolve_one

  abstract_dist = self._get_abstract_dist_for(req_to_install)

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 331, in _get_abstract_dist_for

  skip_reason = self._check_skip_installed(req)

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 236, in _check_skip_installed

  req_to_install.check_if_exists(self.use_user_site)

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\req\req_install.py", line 432, in check_if_exists

  existing_dist = get_distribution(self.req.name)

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\utils\misc.py", line 501, in get_distribution

  dist = search_distribution(req_name)

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\utils\misc.py", line 492, in search_distribution

  packages = get_installed_distributions(skip=())

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\utils\misc.py", line 477, in get_installed_distributions

  return [d for d in working_set

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\utils\misc.py", line 478, in <listcomp>

  if local_test(d) and

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\utils\misc.py", line 386, in dist_is_local

  return is_local(dist_location(dist))

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\utils\misc.py", line 566, in dist_location

  egg_link = egg_link_path(dist)

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\utils\misc.py", line 542, in egg_link_path

  if not virtualenv_no_global() and user_site:

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\utils\virtualenv.py", line 111, in virtualenv_no_global

  return _no_global_under_venv()

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\utils\virtualenv.py", line 72, in _no_global_under_venv

  cfg_lines = _get_pyvenv_cfg_lines()

 File "c:\users\김성민\dropbox\pc\desktop\sparta\projects\03.pedia\venv\lib\site-packages\pip\_internal\utils\virtualenv.py", line 55, in _get_pyvenv_cfg_lines

  return f.read().splitlines() # avoids trailing newlines

UnicodeDecodeError: 'cp949' codec can't decode byte 0x80 in position 18: illegal multibyte sequence

(venv)