Hi, I use Kubuntu 15.04 with backports repository http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu. I did fresh install and dist-upgrade. When I try to add google account, no dialog window appears. Here is my output: 

user@NTBPP707:~$ ktp-contactlist 
QCoreApplication::arguments: Please instantiate the QApplication object first
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QCoreApplication::arguments: Please instantiate the QApplication object first
QCoreApplication::arguments: Please instantiate the QApplication object first
kf5.kiconthemes: "Theme tree: (Breeze)"
ktp-models: invalid index data requested QModelIndex(-1,-1,0x0,QObject(0x0) )
ktp-models: Built with kpeople support, using kpeople model
kf5.kservice.sycoca: Trying to open ksycoca from "/home/mrtvyl/.cache/ksycoca5"
ktp-people: Account manager ready
ktp-common-internals: Current presence changed
ktp-common-internals: Current presence changed
Calling notify on "Sound"
Changing audio state from  Phonon::LoadingState  to  Phonon::StoppedState 
Calling notify on "Taskbar"
0 27262991
Changing audio state from  Phonon::LoadingState  to  Phonon::StoppedState 
Changing audio state from  Phonon::StoppedState  to  Phonon::PausedState 
Changing audio state from  Phonon::PausedState  to  Phonon::PlayingState 
Changing audio state from  Phonon::PlayingState  to  Phonon::StoppedState 
Closing notification 1
not found dbus id to close 1
Don't know how to handle layout QVBoxLayout(0x2693960, name = "verticalLayout_4")
QObject::connect: No such slot KTp::SettingsKcmDialog::enableButtonApply(bool)
QObject::connect: No such signal KTp::SettingsKcmDialog::applyClicked()
ktp-logger: loaded factory : TpLoggerPluginFactory(0x2748550)
ktp-logger: loaded logger plugin :  TpLoggerPlugin(0x274fce0)
Created Utils instance
"google"
../../../../lib/SignOn/connection-manager.cpp 150 init Connected to "libsignon-qt0"
../../../../lib/SignOn/identityimpl.cpp 96 updateState Updating state:  "PendingRegistration" SignOn::IdentityImpl(0x1b84790)
../../../../lib/SignOn/identityimpl.cpp 172 storeCredentials Storing credentials
../../../../lib/SignOn/authsessionimpl.cpp 94 initInterface
../../../../lib/SignOn/authsessionimpl.cpp 94 initInterface
../../../../lib/SignOn/identityimpl.cpp 96 updateState Updating state:  "Ready" SignOn::IdentityImpl(0x1b84790)
../../../../lib/SignOn/identityimpl.cpp 96 updateState Updating state:  "NeedsUpdate" SignOn::IdentityImpl(0x1b84790)
../../../../lib/SignOn/identityimpl.cpp 96 updateState Updating state:  "PendingUpdate" SignOn::IdentityImpl(0x1b84790)
../../../../lib/SignOn/identityimpl.cpp 442 infoUpdated SERVER INFO UPDATED. NeedsUpdate " 0 "
../../../../lib/SignOn/identityimpl.cpp 345 storeCredentialsReply stored id: 57 old id: 0
../../../../lib/SignOn/identityimpl.cpp 381 getInfoReply QMap(("ACL", QVariant(QStringList, ("*")) ) ( "AuthMethods" ,  QVariant(QDBusArgument, ) ) ( "Caption" ,  QVariant(QString, "google") ) ( "Id" ,  QVariant(uint, 57) ) ( "Owner" ,  QVariant(QStringList, ()) ) ( "Realms" ,  QVariant(QStringList, ()) ) ( "RefCount" ,  QVariant(int, 0) ) ( "StoreSecret" ,  QVariant(bool, true) ) ( "Type" ,  QVariant(int, 1) ) ( "UserName" ,  QVariant(QString, "") ) ( "UserNameSecret" ,  QVariant(bool, false) ) ( "Validated" ,  QVariant(bool, false) ) ) 
../../../../lib/SignOn/identityimpl.cpp 96 updateState Updating state:  "Ready" SignOn::IdentityImpl(0x1b84790)
Info:
	Id: 57
	accessControl: ("*")
	caption: "google"
	id: 57
	storingSecret: true
	owner: ""
	userName: ""
../../../../lib/SignOn/identityimpl.cpp 576 remoteObjectDestroyed
../../../../lib/SignOn/identityimpl.cpp 96 updateState Updating state:  "NeedsRegistration" SignOn::IdentityImpl(0x1b84790)

user@NTBPP707:~$ dpkg --list |grep telepathy
ii  kde-config-telepathy-accounts                 15.04.0-0ubuntu1~ubuntu15.04~ppa1          amd64        KDE Control Module for managing Telepathy Accounts
ii  kde-telepathy                                 0.9.0ubuntu1                               all          metapackage for installing all the KDE Telepathy components
ii  kde-telepathy-approver                        15.04.0-0ubuntu1~ubuntu15.04~ppa1          amd64        KDED module for approving incoming conversations
ii  kde-telepathy-auth-handler                    15.04.0-0ubuntu1~ubuntu15.04~ppa1          amd64        KDE Telepathy authentication handler
ii  kde-telepathy-call-ui                         0.9.0-0ubuntu1                             amd64        KDE Telepathy UI for audio/video calls
ii  kde-telepathy-contact-list                    15.04.0-0ubuntu1~ubuntu15.04~ppa1          amd64        Telepathy contact list for the KDE Plasma Desktop
ii  kde-telepathy-data                            15.04.0-0ubuntu1~ubuntu15.04~ppa2          all          Shared data for all the KDE Telepathy components
ii  kde-telepathy-declarative                     0.9.0-0ubuntu3                             amd64        kde-telepathy QtDeclarative QML support
ii  kde-telepathy-filetransfer-handler            15.04.0-0ubuntu1~ubuntu15.04~ppa1          amd64        KDE Telepathy file transfer handler
ii  kde-telepathy-integration-module              15.04.0-0ubuntu1~ubuntu15.04~ppa1          amd64        Telepathy integration module for the KDE Workspace
ii  kde-telepathy-kaccounts                       15.04.0-0ubuntu1~ubuntu15.04~ppa2          amd64        kaccounts plugins for kde-telepathy
ii  kde-telepathy-kpeople                         15.04.0-0ubuntu1~ubuntu15.04~ppa2          amd64        kpeople plugins for kde-telepathy
ii  kde-telepathy-legacy-presence-applet          1.1-0ubuntu1                               amd64        KDE Telepathy Legacy Presence Applet
ii  kde-telepathy-minimal                         0.9.0ubuntu1                               all          metapackage for installing the basic KDE Telepathy components
ii  kde-telepathy-send-file                       15.04.0-0ubuntu1~ubuntu15.04~ppa1          amd64        KDE Telepathy dolphin/konqueror integration plugin
ii  kde-telepathy-text-ui                         15.04.0-0ubuntu1~ubuntu15.04~ppa1          amd64        Telepathy text chat UI for the KDE Plasma Desktop
ii  libtelepathy-farstream3:amd64                 0.6.2-1                                    amd64        Glue library between telepathy and farstream
ii  libtelepathy-glib0:amd64                      0.24.1-1                                   amd64        Telepathy framework - GLib library
ii  libtelepathy-logger-qt4-1:amd64               0.8.0-3ubuntu1                             amd64        Qt bindings for the telepathy-logger library
ii  libtelepathy-logger-qt5:amd64                 15.04.0-0ubuntu1~ubuntu15.04~ppa1          amd64        Qt bindings for the telepathy-logger library
ii  libtelepathy-logger3:amd64                    0.8.1-1                                    amd64        Telepathy logger service - utility library
ii  libtelepathy-qt4-2:amd64                      0.9.6~git1-0ubuntu1                        amd64        Telepathy framework - Qt 4 library
ii  libtelepathy-qt4-farstream2:amd64             0.9.6~git1-0ubuntu1                        amd64        Telepathy/Farsight integration - Qt 4 library
ii  libtelepathy-qt5-0:amd64                      0.9.3-0ubuntu18                            amd64        Telepathy framework - Qt 5 library
ii  libtelepathy-qt5-1:amd64                      0.9.6~git1-0ubuntu1                        amd64        Telepathy framework - Qt 5 library
ii  telepathy-gabble                              0.18.3-1                                   amd64        Jabber/XMPP connection manager
ii  telepathy-haze                                0.8.0-2                                    amd64        Telepathy connection manager that uses libpurple
ii  telepathy-logger                              0.8.1-1                                    amd64        Telepathy logger service - Daemon
ii  telepathy-mission-control-5                   1:5.16.3-1ubuntu1                          amd64        management daemon for Telepathy real-time communication framework
ii  telepathy-salut                               0.8.1-4                                    amd64        Link-local XMPP connection manager for the Telepathy framework




Reproducible: Always