Version-Release number of selected component:
yumex-dnf-4.1.1-1.fc21

Additional info:
reporter:       libreport-2.3.0
cmdline:        /usr/bin/python3 -tt /usr/bin/yumex-dnf
executable:     /usr/bin/yumex-dnf
kernel:         3.19.5-200.fc21.x86_64
runlevel:       N 5
type:           Python3
uid:            1000

Truncated backtrace:
status.py:91:__init__:AttributeError: 'NoneType' object has no attribute 'GetVersion'

Traceback (most recent call last):
  File "/usr/lib/python3.4/site-packages/yumex/__init__.py", line 1168, in do_command_line
    self.status = yumex.status.StatusIcon(self)
  File "/usr/lib/python3.4/site-packages/yumex/status.py", line 91, in __init__
    (self.dbus_interface, self.daemon.GetVersion()))
AttributeError: 'NoneType' object has no attribute 'GetVersion'

Local variables in innermost frame:
app: <YumexApplication object at 0x7f50b83dc828 (yumex+YumexApplication at 0x1b61270)>
self: <yumex.status.StatusIcon object at 0x7f50b83e32e8>

Potential duplicate: bug 1217241