Redirect to different location (Dropbox etc.) not working

I am using external file hosting on Mediafire and was able to create two releases that download from there but for some reason when I try to create new releases even if I choose the Redirect to different location from the Dropbox it says “No files have been uploaded to the releases folder: /home/promodow/public_html/wp-content/uploads/2020/
You must do this first before adding a release!”

There doesn’t seem to be a way to tell it I want it to download from the external source.