Mod Uploader issue

In the case when all the mod files for different versions of the game are placed inside the archived_versions folder, and the mod root folder does not contain files:
The game itself works as expected, loads the correct version of the mod.
But the Mod Uploader cannot upload such a mod to the Workshop.

The Mod Uploader requires a mod_info.yaml file in the root folder. But why ? There are no files here that the game should load. Each folder inside the archived_versions folder already contains the correct mod_info.yaml file, and that's enough.