Description of problem:
I do: " fedup --network 22" from root

Version-Release number of selected component:
dnf-0.6.4-7.fc21

Additional info:
reporter:       libreport-2.3.0
cmdline:        /usr/bin/python -OO /usr/bin/dnf system-upgrade download --releasever 22
dso_list:       python2-dnf-plugin-system-upgrade-0.5.0-1.fc21.noarch
executable:     /usr/bin/dnf
kernel:         4.1.13-100.fc21.x86_64
runlevel:       N 5
type:           Python
uid:            0

Truncated backtrace:
system_upgrade.py:344:__init__:TypeError: must be type, not None

Traceback (most recent call last):
  File "/usr/bin/dnf", line 36, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 185, in user_main
    errcode = main(args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 84, in main
    return _main(base, args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 115, in _main
    cli.configure(map(ucd, args))
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 976, in configure
    self.base.plugins.run_init(self.base, self)
  File "/usr/lib/python2.7/site-packages/dnf/plugin.py", line 104, in run_init
    plugin = p_cls(base, cli)
  File "/usr/lib/python2.7/site-packages/dnf-plugins/system_upgrade.py", line 344, in __init__
    super(SystemUpgradePlugin, self).__init__(base, cli)
TypeError: must be type, not None

Local variables in innermost frame:
self: <dnf.plugin.dynamic.system_upgrade.SystemUpgradePlugin object at 0x7f44e7b1a990>
base: <dnf.cli.cli.BaseCli object at 0x7f44e945ca90>
cli: <dnf.cli.cli.Cli object at 0x7f44e946c190>