Auto update plugin: Key can’t be saved

Dear supporters:
I can’t saved the key I have got on https://villatheme.com/my-download/. Maybe it has to do with the fact that my dashboard for settings does not look like your dashboard screenshot (https://villatheme.com/knowledge-base/how-to-use-auto-update-feature/ > How to use Auto Update feature > The first way: > Step 6 (see attached picture))
On my dashboard I don’t have any tabs for “General”, “Design”, “Messages” etc. There is only a Auto Update Key field and a Save-Key-Button that does not work (see attached picture).
It will be great you can help me.
Regards
H. A.