Linux mint 20.1でシステム設定を開くことができません。

システム設定を開くことができず、コマンドを使用して端末でシステム設定を開始しようとすると、cinnamon-settings次のエラーが発生します。

Using PAM module (python3-pam)
Traceback (most recent call last):
  File "/usr/share/cinnamon/cinnamon-settings/cinnamon-settings.py", line 731, in <module>
    window = MainWindow()
  File "/usr/share/cinnamon/cinnamon-settings/cinnamon-settings.py", line 310, in __init__
    for module in modules:
  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_user.py", line 10, in <module>
    import pexpect
  File "/usr/lib/python3/dist-packages/pexpect/__init__.py", line 75, in <module>
    from .pty_spawn import spawn, spawnu
  File "/usr/lib/python3/dist-packages/pexpect/pty_spawn.py", line 14, in <module>
    from .spawnbase import SpawnBase
  File "/usr/lib/python3/dist-packages/pexpect/spawnbase.py", line 224
    def expect(self, pattern, timeout=-1, searchwindowsize=-1, async=False):
                                                               ^
SyntaxError: invalid syntax
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 153, in apport_excepthook
    with os.fdopen(os.open(pr_filename,
FileNotFoundError: [Errno 2] No such file or directory: '/var/crash/_usr_share_cinnamon_cinnamon-settings_cinnamon-settings.py.1000.crash'

Original exception was:
Traceback (most recent call last):
  File "/usr/share/cinnamon/cinnamon-settings/cinnamon-settings.py", line 731, in <module>
    window = MainWindow()
  File "/usr/share/cinnamon/cinnamon-settings/cinnamon-settings.py", line 310, in __init__
    for module in modules:
  File "/usr/share/cinnamon/cinnamon-settings/modules/cs_user.py", line 10, in <module>
    import pexpect
  File "/usr/lib/python3/dist-packages/pexpect/__init__.py", line 75, in <module>
    from .pty_spawn import spawn, spawnu
  File "/usr/lib/python3/dist-packages/pexpect/pty_spawn.py", line 14, in <module>
    from .spawnbase import SpawnBase
  File "/usr/lib/python3/dist-packages/pexpect/spawnbase.py", line 224
    def expect(self, pattern, timeout=-1, searchwindowsize=-1, async=False):
                                                               ^
SyntaxError: invalid syntax

この問題を解決するのに役立つ人はいますか？