When calling file path, server calls custom server URL instead of Assets Library for .webp file

The following is the line of code used to obtain the file

let persona_filename = personas/${active_persona}.Webp;

but I get the following console error:
Screenshot 2025-01-12 174442

However, the link in the assets library is:
https://assets.forge-vtt.com/65d067c8d2891a2d00af9d6a/personas/Selene.webp

Any help would be greatly appreciated.