Hello,
By default web viewer can open image file if image file is stored in application folder on server side.
In your case image file is not stored in application folder on server side. In this case you can go by 2 ways.
WAY 1: Copy image file to the application folder.
WAY 2: Create custom data storage and override algorithm that load file data. Please read how to view images from database here:
https://www.vintasoft.com/docs/vsimagin ... abase.html Use this example and use custom file folder instead of database access.
Let me know if you will have any question or problem.
Best regards, Alexander