Probleme nach Upgrade auf 20.1

[Firnefex]

Hallo!
Ich habe nun Mint 20.1 Cinnamon und kann seitdem weder die Spiegelserverliste der Aktualisierungsverwaltung öffnen (es fragt ob ich auf einen schnelleren wechseln mag->ja->Passwort->nichts), und ebenso die Anwendungsverwaltung, die einfach nicht aufgeht. Sonst habe ich die letzten Tage keine Probleme feststellen können. Hat jemand ein ähnliches Problem? Konnte leider nichts dazu im Internet finden.
Hier sind die Ausgaben des Terminals:

mintupdate

Code: [Auswählen]

~$ /usr/lib/linuxmint/mintUpdate/mintUpdate.py:1123: DeprecationWarning: Gdk.threads_init is deprecated
  Gdk.threads_init()
/usr/lib/linuxmint/mintUpdate/mintUpdate.py:1269: DeprecationWarning: Gtk.ImageMenuItem.set_image is deprecated
  menuItem3.set_image(image)
/usr/lib/linuxmint/mintUpdate/mintUpdate.py:638: DeprecationWarning: Gdk.threads_enter is deprecated
  Gdk.threads_enter()
/usr/lib/linuxmint/mintUpdate/mintUpdate.py:645: DeprecationWarning: Gdk.threads_leave is deprecated
  Gdk.threads_leave()
Traceback (most recent call last):
  File "/usr/lib/linuxmint/mintSources/mintSources.py", line 29, in <module>
    import mintcommon.aptdaemon
  File "/usr/lib/python3/dist-packages/mintcommon/aptdaemon.py", line 9, in <module>
    import aptdaemon.client
  File "/usr/lib/python3/dist-packages/aptdaemon/client.py", line 41, in <module>
    from . import enums
ImportError: cannot import name 'enums' from 'aptdaemon' (/usr/lib/python3/dist-packages/aptdaemon/__init__.py)
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] Datei oder Verzeichnis nicht gefunden: '/var/crash/_usr_lib_linuxmint_mintSources_mintSources.py.0.crash'

Original exception was:
Traceback (most recent call last):
  File "/usr/lib/linuxmint/mintSources/mintSources.py", line 29, in <module>
    import mintcommon.aptdaemon
  File "/usr/lib/python3/dist-packages/mintcommon/aptdaemon.py", line 9, in <module>
    import aptdaemon.client
  File "/usr/lib/python3/dist-packages/aptdaemon/client.py", line 41, in <module>
    from . import enums
ImportError: cannot import name 'enums' from 'aptdaemon' (/usr/lib/python3/dist-packages/aptdaemon/__init__.py)
und mintinstall

Code: [Auswählen]

Traceback (most recent call last):
  File "/usr/lib/linuxmint/mintinstall/mintinstall.py", line 27, in <module>
    from mintcommon.installer import installer
  File "/usr/lib/python3/dist-packages/mintcommon/installer/installer.py", line 10, in <module>
    from . import cache, _flatpak, _apt
  File "/usr/lib/python3/dist-packages/mintcommon/installer/cache.py", line 11, in <module>
    from . import _apt
  File "/usr/lib/python3/dist-packages/mintcommon/installer/_apt.py", line 11, in <module>
    import aptdaemon.client
  File "/usr/lib/python3/dist-packages/aptdaemon/client.py", line 41, in <module>
    from . import enums
ImportError: cannot import name 'enums' from 'aptdaemon' (/usr/lib/python3/dist-packages/aptdaemon/__init__.py)
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] Datei oder Verzeichnis nicht gefunden: '/var/crash/_usr_lib_linuxmint_mintinstall_mintinstall.py.1000.crash'

Original exception was:
Traceback (most recent call last):
  File "/usr/lib/linuxmint/mintinstall/mintinstall.py", line 27, in <module>
    from mintcommon.installer import installer
  File "/usr/lib/python3/dist-packages/mintcommon/installer/installer.py", line 10, in <module>
    from . import cache, _flatpak, _apt
  File "/usr/lib/python3/dist-packages/mintcommon/installer/cache.py", line 11, in <module>
    from . import _apt
  File "/usr/lib/python3/dist-packages/mintcommon/installer/_apt.py", line 11, in <module>
    import aptdaemon.client
  File "/usr/lib/python3/dist-packages/aptdaemon/client.py", line 41, in <module>
    from . import enums
ImportError: cannot import name 'enums' from 'aptdaemon' (/usr/lib/python3/dist-packages/aptdaemon/__init__.py)
Kann mir jemand helfen?