Can not add custom action to context menu in Dolphin for Windows

Adding new actions to Dolphin context menu seems possible in Microsoft Windows. But it shows a permission error with the message “You are not authorized to execute this file”.

Is there a way to solve that?

STEPS TO REPRODUCE

  1. Download the last portable version of Dolphin for Windows in:
    https://cdn.kde.org/ci-builds/system/dolphin/master/windows/dolphin-master-5102-windows-cl-msvc2022-x86_64.7z
  2. Extract the file in some folder
  3. Create a Dolphin service menu using the procedure specified at:
    Creating Dolphin service menus | Developer
    3.1. Create a file “myservicemenu.desktop” in the locaction
    C:\Users\USER\AppData\Local\kio\servicemenus\myservicemenu.desktop
    (where “USER” is the current user)
    3.2. Specify the action as:
        [Desktop Entry]
        Type=Service
        MimeType=all/all;
        Actions=MyCustomAction;

        [Desktop Action MyCustomAction]
        Name=Custom Action
        Icon=edit
        Exec=notepad.exe %f
  1. Execute dolphin.exe from the bin folder extracted in step 2,
  2. Right click any plain text file and choose new item “Custom Action” added in step 3

OBSERVED RESULT

BUG REPORT: 498581 – Permission error when adding actions to Dolphin context menu in Windows version