RE: Getting "Must be admin user" - but I already am?

You are the admin of your "bot", but not the "avatar".
You have selected the avatar "Julie 3 Business", you cannot edit this avatar, as you did not create it, it is one of our avatars. You can create your own avatar by clicking "Create", you cannot click "Edit".

To create your own avatar see,
https://www.botlibre.com/forum-post?id=682689

Or select a different avatar from the drop down.

If you would like a custom designed avatar, we can design this for you if you upgrade to Platinum.