So, I am not sure why this is happening. I have been trying to solve this preview problem and it looks like the pictures are not loading when the extension is installed. I copied the image files from my other computer and put them in the WAPreview/siteassistpro_images folder. Now I get partial / incomplete site previews. The page has 4 errors. For some reason it is trying to load the pictures with my other machines Home Directory name (alivan).
I have uninstalled and re-installed a few times now. Always the same outcome.
Attached is a picture of the error warnings.