Dolphin don't start well under Plasma

Hello,
under Plasma ‘dolphin’ don’t start well. Window is empty. Program don’t react.

But under LXQt ‘dolphin’ woks well.
$ dolphin
Shortcut for action “open_in_KLook” “Vorschau” set with QAction::setShortcut()! Use KActionCollection::setDefaultShortcut(s) instead.
QObject::connect: No such slot DolphinMainWindow::focusChanged(QWidget*,QWidget*)
QObject::connect: (receiver name: ‘Dolphin#1’)
Cannot creat accessible child interface for object: PlacesView(0x19ba280) index: 19
klauncher not running… launching kdeinit
kdeinit5: preparing to launch ‘/usr/lib64/libexec/kf5/klauncher’
kdeinit5: Launched KLauncher, pid = 3990, result = 0
kdeinit5: opened connection to :0
kdeinit5: Got EXEC_NEW ‘/usr/lib64/qt5/plugins/kf5/kio/file.so’ from launcher.
kdeinit5: preparing to launch ‘/usr/lib64/qt5/plugins/kf5/kio/file.so’
kdeinit5: Got EXEC_NEW ‘/usr/lib64/qt5/plugins/kf5/kio/trash.so’ from launcher.
kdeinit5: preparing to launch ‘/usr/lib64/qt5/plugins/kf5/kio/trash.so’
kdeinit5: Got EXEC_NEW ‘/usr/lib64/qt5/plugins/kf5/kio/file.so’ from launcher.
kdeinit5: preparing to launch ‘/usr/lib64/qt5/plugins/kf5/kio/file.so’

Here the Screenshot in KDE-Plasma:

with regards
Ch. Hanisch

also with a new user?

Yes, the same problem.
But sometimes occasionally does work.

I think this is an bug in OpenMandriva Lx 3.0 KDE-Plasma.

with regards
Ch. Hanisch