Images not populating

I have entered in short codes into the post_content and featured_image sections on my csv file to upload using wp ultimate CSV importer Pro. The file uploads and the short code is generated under the images short code tab. However under Action section when I click populate I am getting a message that it was “partially replaced” and the status is either “in progress” or “partially”. I don’t know why I am not getting the “success” button and why my short code is not getting successfully populated.

Any help here would be greatly appreciated!

https://www.ads-software.com/plugins/wp-ultimate-csv-importer/