I'm playing Stellaris. The tutorial AI has been repeatedly (literally non stop) telling me to create sectors.
There is a Planets & Sectors menu as part of the main menu bar (it's even mapped to F4). It does not contain a "create sector" or "split into setors" or any such sort of UI element.
I've looked long and hard through the UI, and nothing solves this issue
I've tried clicking on outside the menu onto solar systems while the Planets & Sectors menu is open, and I've tried unfolding the only sector I have and clicking everywhere within that.
I get taken to different other parts of the game. This planet, that leader, my empire tab, etc. etc. etc... nothing is meant as a create sector button.
I've also dug up old screenshots in this thread: https://steamcommunity.com/app/281990/discussions/0/357286119102514045/
In which you can see a "Create new Sector" button, but the interface has clearly changed since then.