Very simple, playing as Hisn Kayfa, I noticed that while the game demanded I set rivals on pain of reduced power projection, but when I went to check my options I saw this: https://imgur.com/a/t2nCj
If it helps, choosing a rival was the first thing I did, before any other options/decisions.
If it helps, choosing a rival was the first thing I did, before any other options/decisions.