So how do you animate R15 models now in Blender?

I read this Blender rig exporter/animation importer
and watched this How To Create Your First Blender Animation For Roblox [BEGINNERS] - YouTube

The problem is the Blender Python script doesn’t work. It doesn’t show the Import Roblox Animations in the “Import” area either, nor can I find it anywhere.

Do I have to go into an older version of Blender, because I don’t feel like doing so. I rather would take the script and fix it.

 

Is there someone that uses Blender to create Roblox Animations that can tell me how they do it?

Edit:
The script is not broken if you run it into Blender’s text editor. But then I have to run it every time.