Spectacle doesn't works if I add to panel (widget) Invalid service name: org.kde.spectacle error

on my laptop 1=ASUS vivobook pro N552VW-FY204T (2016) with freshly installed leap 16.0 running KDE
if I click on application-menu>spectacle it works
if I rightclick on application-menu>spectacle and select add to panel (widget) spectacle is added to panel but if I click on it it doesn’t works and a system notification popup with this error
Invalid service name: org.kde.spectacle
how can I get spectacle working clicking on the panel icon?

Use the print key on your keyboard.

yes I know that it works and also the application menu icon, Iwould like to know why the icon in the panel doesn’t works, or may be I can open a bug issue if it could be a bug

It works here.

Do you use x11 or wayland?

Post:

inxi -Ga

Do you use x11 or wayland?
oh I don’t know, I freshly installed 16.0 I suppose wayland becouse I read that this was the default

here is

eros@localhost:~> inxi -Ga
Graphics:
  Device-1: Intel HD Graphics 530 vendor: ASUSTeK driver: i915 v: kernel
    arch: Gen-9 process: Intel 14n built: 2015-16 ports: active: eDP-1
    empty: DP-1,HDMI-A-1,HDMI-A-2 bus-ID: 00:02.0 chip-ID: 8086:191b
    class-ID: 0300
  Device-2: NVIDIA GM107M [GeForce GTX 960M] vendor: ASUSTeK driver: nouveau
    v: kernel non-free: 550.xx+ status: current (as of 2024-09; EOL~2026-12-xx)
    arch: Maxwell code: GMxxx process: TSMC 28nm built: 2014-2019 pcie: gen: 1
    speed: 2.5 GT/s lanes: 8 link-max: gen: 3 speed: 8 GT/s lanes: 16
    bus-ID: 01:00.0 chip-ID: 10de:139b class-ID: 0302 temp: 36.0 C
  Device-3: IMC Networks USB2.0 HD UVC WebCam driver: uvcvideo type: USB
    rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-4:3 chip-ID: 13d3:5666
    class-ID: 0e02 serial: NULL
  Display: x11 server: X.Org v: 21.1.15 with: Xwayland v: 24.1.6
    compositor: kwin_x11 driver: X: loaded: modesetting unloaded: vesa
    alternate: fbdev,intel,nouveau,nv,nvidia dri: iris,nouveau gpu: i915
    display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.00x11.22")
    s-diag: 582mm (22.93")
  Monitor-1: eDP-1 model: LG Display 0x046f built: 2014 res: 1920x1080
    hz: 60 dpi: 142 gamma: 1.2 size: 344x194mm (13.54x7.64") diag: 395mm (15.5")
    ratio: 16:9 modes: 1920x1080
  API: EGL v: 1.5 hw: drv: intel iris drv: nvidia nouveau platforms:
    device: 0 drv: iris device: 1 drv: nouveau device: 2 drv: swrast gbm:
    drv: iris surfaceless: drv: iris x11: drv: iris inactive: wayland
  API: OpenGL v: 4.6 compat-v: 4.3 vendor: intel mesa v: 24.3.3 glx-v: 1.4
    direct-render: yes renderer: Mesa Intel HD Graphics 530 (SKL GT2)
    device-ID: 8086:191b memory: 7.58 GiB unified: yes
  API: Vulkan Message: No Vulkan data available.
eros@localhost:~> 

checked, I was in X11, now I am in wayland becouse cube works, but spectacle continue to fail

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