claudia-error

archlinux 64-bit
jack2-dbus is installed via official repo
pulseaudio is not installed
cadence is installed via AUR repo
jack is running realtime
user in audio group

$ claudia
Using Tray Engine 'Qt'
Traceback (most recent call last):
  File "/usr/lib/python3.5/site-packages/dbus/bus.py", line 175, in activate_name_owner
    return self.get_name_owner(bus_name)
  File "/usr/lib/python3.5/site-packages/dbus/bus.py", line 361, in get_name_owner
    's', (bus_name,), **keywords)
  File "/usr/lib/python3.5/site-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NameHasNoOwner: Could not get owner of name 'org.ladish': no such name

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/share/cadence/src/claudia.py", line 2717, in <module>
    gDBus.ladish_control = gDBus.bus.get_object("org.ladish", "/org/ladish/Control")
  File "/usr/lib/python3.5/site-packages/dbus/bus.py", line 241, in get_object
    follow_name_owner_changes=follow_name_owner_changes)
  File "/usr/lib/python3.5/site-packages/dbus/proxies.py", line 248, in __init__
    self._named_service = conn.activate_name_owner(bus_name)
  File "/usr/lib/python3.5/site-packages/dbus/bus.py", line 180, in activate_name_owner
    self.start_service_by_name(bus_name)
  File "/usr/lib/python3.5/site-packages/dbus/bus.py", line 278, in start_service_by_name
    'su', (bus_name, flags)))
  File "/usr/lib/python3.5/site-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The name org.ladish was not provided by any .service files