I'm basing this bug on what I read on the tool tip for claim colony. It read that you may claim a colony if all 4 types of settlements exist. But that doesn't work. If the intent is that all provinces must have a settlement (any country) then if you have all 4 then you may claim, I don't think that works either but thats been a few months since i tried that. But it doesn't read that way.
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