Description of problem:
I started Yum Extender (DNF) nothing happend for 10 seconds I tried to exit then this error happend.

Version-Release number of selected component:
yumex-dnf-4.1.3-2.fc23

Additional info:
reporter:       libreport-2.6.2
cmdline:        /usr/bin/python3 -tt /usr/bin/yumex-dnf
executable:     /usr/bin/yumex-dnf
kernel:         4.3.0-0.rc1.git0.1.fc24.x86_64
runlevel:       N 5
type:           Python3
uid:            1000

Truncated backtrace:
status.py:132:handle_dbus_signals:AttributeError: 'NoneType' object has no attribute 'on_status_icon_clicked'

Traceback (most recent call last):
  File "/usr/lib/python3.4/site-packages/yumex/status.py", line 71, in __call__
    return getattr(self.proxy, self.method)(*args)
  File "/usr/lib/python3.4/site-packages/yumex/status.py", line 120, in _on_g_signal
    self.handle_dbus_signals(proxy, sender, signal, args)
  File "/usr/lib/python3.4/site-packages/yumex/status.py", line 132, in handle_dbus_signals
    self.app.win.on_status_icon_clicked(force=True)
AttributeError: 'NoneType' object has no attribute 'on_status_icon_clicked'

Local variables in innermost frame:
proxy: <DBusProxy object at 0x7f7698109630 (GDBusProxy at 0x563563307200)>
sender: ':1.150'
signal: 'ShowSignal'
run_pid: 3295
args: (3295,)
self: <yumex.status.StatusIcon object at 0x7f769810e048>

Potential duplicate: bug 1233007