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Problem: Kamelands, unable to build settlement after Annex. pathfinder kingmaker only one settlement can be founded in this region.

Solution: you don't have to click on the region itself. Click on the small wood signs in the region. This way to game knows you want to build the settlement / village.

German: Auf die Schilder in der Region klicken, nicht auf die Region selbst um ein Dorf zu bauen.