The same for me.
kbluetooth4-devicemanager can't connect with kbluetooth4:
kbluetooth4-devicemanager(7101) Solid::Control::ManagerBasePrivate::loadBackend: Backend loaded:  "BlueZ"
process 7101: arguments to dbus_message_new_method_call() were incorrect, assertion "path != NULL" failed in file dbus-message.c line 1070.                                                                                                               
This is normally a bug in some application using the D-Bus library.                                                          
QDBusConnection: error: could not send message to service "org.bluez" path "" interface "org.freedesktop.DBus.Introspectable" member "Introspect"
kbluetooth4-devicemanager(7101) DeviceMan::DeviceMan: Device Manager - Welcome
kbluetooth4-devicemanager(7101) DeviceMan::getConfiguredDevices: Device List Size:  0
kbluetooth4-devicemanager(7101) DeviceMan::slotStartWizard: Starting Wizard
kbluetooth4-wizard(7106) Solid::Control::ManagerBasePrivate::loadBackend: Backend loaded:  "BlueZ"
process 7106: arguments to dbus_message_new_method_call() were incorrect, assertion "path != NULL" failed in file dbus-message.c line 1070.
This is normally a bug in some application using the D-Bus library.
QDBusConnection: error: could not send message to service "org.bluez" path "" interface "org.freedesktop.DBus.Introspectable" member "Introspect"
Object::connect: No such slot BTWizard::slotValidatePage()
kbluetooth4-wizard(7106) BTWizard::slotNext: Page ID:  1
kbluetooth4-wizard(7106) BTWizard::slotNext: Page ID:  2
kbluetooth4-wizard(7106) BTWizard::slotNext: page 2 reached!
kbluetooth4-wizard(7106) BTWizard::slotSearch: searching...
process 7106: arguments to dbus_message_new_method_call() were incorrect, assertion "path != NULL" failed in file dbus-message.c line 1070.
This is normally a bug in some application using the D-Bus library.
QDBusConnection: error: could not send message to service "org.bluez" path "" interface "org.bluez.Adapter" member "DiscoverDevices"
kbluetooth4-wizard(7106) BTWizard::~BTWizard: Deleting Wizard
kbluetooth4-devicemanager(7101) DeviceMan::~DeviceMan: inputDeviceMap deleted
kbluetooth4-devicemanager(7101) DeviceMan::~DeviceMan: remoteDeviceMap deleted
kbluetooth4-devicemanager(7101) DeviceMan::~DeviceMan: Device Manager closed

DBus is working:
katoda@compal ~ $ ps aux | grep dbus
105       4974  0.0  0.0   3040  1360 ?        Ss   07:42   0:00 /bin/dbus-daemon --system
root      5689  0.0  0.0   3124   680 ?        S    07:43   0:00 dbus-launch --autolaunch 19452e83451b572343b675ec48f6e5fe --binary-syntax --close-stderr
root      5692  0.0  0.0   2640   728 ?        Ss   07:43   0:00 //bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session
katoda    5750  0.0  0.0   3532   960 ?        Ss   07:43   0:00 /usr/bin/ck-launch-session /usr/bin/dbus-launch --exit-with-session x-session-manager
katoda    5791  0.0  0.0   4740   636 ?        Ss   07:43   0:00 /usr/bin/ssh-agent /usr/bin/ck-launch-session /usr/bin/dbus-launch --exit-with-session x-session-manager
katoda    5808  0.0  0.0   3124   672 ?        S    07:43   0:00 /usr/bin/dbus-launch --exit-with-session x-session-manager
katoda    5809  0.0  0.0   2904  1100 ?        Ss   07:43   0:00 //bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session
root      6615  0.0  0.0   3124   704 ?        S    07:52   0:00 dbus-launch --autolaunch 19452e83451b572343b675ec48f6e5fe --binary-syntax --close-stderr
root      6616  0.0  0.0   2640   760 ?        Ss   07:52   0:00 //bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session