The XAML content is not displayed in CorelDRAW when starting the docker (addon)

I wrote docker in c#. My friend installed it at home and it shows an empty docker. The Xaml markup is not displayed. The versions of CorelDraw program match (26.1.0.143).

Me and a few friends have it showing all the elements.
I used Target Framework: .Net 4.8 for compilation.
What could be the problem? In XAML styles? is there any way to check by adding something to the code?

  • There are certainly several reasons this could be the case, but one really sneaky one that I recently ran into was that the docker won't load if the files are "blocked" because they were downloaded from the internet. 

    Go to the file properties on a file on your friend's computer and look at the bottom for an "Unblock" button. If you see this, Unblock all the files and restart Draw.