Settings in Gnome doesn't open

I'm using Debian 10 buster with Gnome display manager. Recently I haven't been able to access the system settings tab that was usually always in the left bottom corner of the pop out menu that allows you to log out, shutdown etc...

It always used to be there and now I can't change system settings I find this strange. Any idea what might be the cause of this?

Thanks!

Image of drop down menu I was talking about in Debian 10 included. Notice the left hand corner of the menu where there's nothing (but there used to be a settings icon)
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