Traceback (most recent call last):
  File "/usr/share/kupfer/kupfer/ui/preferences.py", line 574, in callback
    if plugin_support.UserNamePassword.is_backend_encrypted():
  File "/usr/share/kupfer/kupfer/plugin_support.py", line 164, in is_backend_encrypted
    return keyring.core.get_keyring().supported() == 1
AttributeError: 'Keyring' object has no attribute 'supported'