When importing roblox rig into blender it gives an error

this is the error I am getting

I am using the blender animations plugin with blender 4.0, I have installed the rbx importer plugin of blender and it still doesnt work, I have also tried getting a custom rig from the internet but after animating it I couldnt import it into blender saying that the animation failed to load

External Media

downgrade to an older version of blender for now