I am confused as to what this admin panel actually is because I installed it properly, gave myself permissions, and even binded it to the H key, and nothing happens when I press H or type in the command to show the admin panel.

What am I supposed to see? The only thing that changed is a vanish button on the right center side of my screen. That's it. I can do /vanish even before installing this so I am confused why the only thing that has changed on my computer since installing and configuring this is just the vanish command which I had previously....

Please advise what this actually is. I want to give it a try but as of now it is not doing anything or bringing up any "panel"