Is your feature request related to a problem? Please describe.
It seems that this github repository does not have the code from the build 1.18.2-1.0.1, and was last updated 2 years ago, and not a few months ago

Describe the solution you'd like
An up-to-date repo

Additional context
I'm trying to contribute filtering by tag, and might look into making that work with the gui, or groups, or something. But while I can download the source code from releases and edit that, it's a little inconvenient to not be able to just clone the repo.

Do it means that this project is actually closed source?

It's in a different branch...