Version-Release number of selected component:
setroubleshoot-3.3.16-1.fc27

Additional info:
reporter:       libreport-2.9.3
cmdline:        /usr/bin/python3 /usr/bin/seapplet
crash_function: send_notification
exception_type: GLib.GError
executable:     /usr/bin/seapplet
kernel:         4.15.4-300.fc27.x86_64
runlevel:       N 5
type:           Python3
uid:            1000

Truncated backtrace:
seapplet:138:send_notification:GLib.GError: g-dbus-error-quark: GDBus.Error:org.freedesktop.DBus.Error.NoReply: Message recipient disconnected from message bus without replying (4)

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/pydbus/subscription.py", line 52, in <lambda>
    callback = (lambda con, sender, object, iface, signal, params: signal_fired(sender, object, iface, signal, params.unpack())) if signal_fired is not None else lambda *args: None
  File "/usr/bin/seapplet", line 138, in send_notification
    n.show()
GLib.GError: g-dbus-error-quark: GDBus.Error:org.freedesktop.DBus.Error.NoReply: Message recipient disconnected from message bus without replying (4)

Local variables in innermost frame:
n: <Notify.Notification object at 0x7fe22265e8b8 (NotifyNotification at 0x5604e40325a0)>
params: ('yellow', '087d60b8-e422-453c-a258-549ace76c6da')
signal: 'alert'
iface: 'org.fedoraproject.SetroubleshootdIface'
dobject: '/org/fedoraproject/Setroubleshootd'
sender: ':1.59'
self: <__main__.SEApplet object at 0x7fe222eba990 (__main__+SEApplet at 0x5604e404f120)>