Windows - Why am I getting 'Scandit.BarcodePicker.StartStopCaptureException'?

The StartStopException could be caused by the fact that the VideoInputRT.FrameAcess class is not marked as "activateable". This needs to be done in the app manifest using the extension element.

Check the extensions section looks like this:

<Extensions> 
     <Extension Category="windows.activatableClass.inProcessServer"> 
          <InProcessServer> 
                <Path>VideoInputRT.dll</Path> 
                <ActivatableClass ActivatableClassId="VideoInputRT.FrameAccess"             ThreadingModel="both"/> 
         </InProcessServer> 
     </Extension> 
</Extensions>