Writing XML code for multi-app kiosk for Windows desktop - windows

Question

I'm trying to create multi-app kiosk for one of our computer in the office running Windows 10 pro.
It works with Microsoft apps such as Calculator, Internet Explorer, but I'm trying to create one for one of our in-house app and it didn't work. When in kiosk mode, it came up with the app button but with a text of the location to the app itself (eg: W~C:\path\to\app\app.exe - I don't know what W~ means). And when I click on it, nothing happens. With multi-app kiosk, you have to write an XML file to allow which app to run:
<Profiles>
<Profile Id="{some id}">
<AllAppsList>
<AllowedApps>
<App DesktopAppPath="C:\path\to\app\app.exe" />
</AllowedApps>
</AllAppsList>
<StartLayout>
<![CDATA[<LayoutModificationTemplate xmlns:defaultlayout="http://schemas.microsoft.com/Start/2014/FullDefaultLayout" xmlns:start="http://schemas.microsoft.com/Start/2014/StartLayout" Version="1" xmlns="http://schemas.microsoft.com/Start/2014/LayoutModification">
<LayoutOptions StartTileGroupCellWidth="6" />
<DefaultLayoutOverride>
<StartLayoutCollection>
<defaultlayout:StartLayout GroupCellWidth="6">
<start:Group Name="TAS">
<start:DesktopApplicationTile Size="2x2" Column="0" Row="0" DesktopApplicationID="C:\path\to\app\app.exe" />
</start:Group>
</defaultlayout:StartLayout>
</StartLayoutCollection>
</DefaultLayoutOverride>
</LayoutModificationTemplate>
]]>
</StartLayout>
</Profile>
</Profiles>
I was just wondering if there's something that you need to set in the <App> tag to specify the library path/working folder? Is there any documentation about on how to write XML files for multi-app kiosk? I found this on the Microsoft website but not in details:
https://learn.microsoft.com/en-us/windows/configuration/lock-down-windows-10-to-specific-apps