"No installed components were detected . (0x800F1000)" - What does it mean ?

[sigmarsson]

It occurs when Prism attempts to associate shell to the main window. However the code has not changed, only Prism 9 updated.

Exception thrown: 'System.Runtime.InteropServices.COMException' in WinRT.Runtime.dll
WinRT information: Element is already the child of another element.
An exception of type 'System.Runtime.InteropServices.COMException' occurred in WinRT.Runtime.dll but was not handled in user code
WinRT information: Element is already the child of another element.
No installed components were detected. (0x800F1000)