Archipack window not showing anything I haven't tried Archipack previously but anyways, after going like this:
and when I click on Windows it shows up this black patch in middle of the viewport:
I tried Wall and it worked well as it added a wall type mesh, but in this case windows aren't showing up, that black patch covers my viewport..
Blender's official Archipack addon require additional setup steps in order to work.
Preferences -> Add-ons -> archipack -> Setup Actions -> Render Thumbs

From: 
https://github.com/s-leger/archipack/issues/88