Can't Place Colonist - Buildings full

[Baxen]

I'm having a problem. All my buildings are full, but the game won't let me click finished and gives me the error "You still have some unmanned buildings or plantations". I tried everything, clicking on every spot on the game board. The only thing that came up was when I click on the colonist (Red noble) in my upper middle coffee plantation, rather than returning them to my hand it gives me a message "This colonist is not yours".

Here's the imugr link. Am I missing something? https://imgur.com/M318r58

I noticed there was a bug report for something similar from 2 years ago, but a lot of the previous comments stated it wasn't a bug and the player was just missing something.

This is going to be a really stupid way for me to get my first quit/time-out.

[robinzig]

I'm far from expert at PR but, looking at your screenshot, I can't see anywhere you could place a colonist so this looks like a bug to me.

EDIT: except, I have no idea what the red colonists signify. I guess this is some expansion I'm not familiar with, so I probably can't really comment on this game situation...

[Een]

Often there has been wrong reports because a player doesn't see that one of their buildings has a second space.
Doesn't seem to be the case here though. Maybe try sending the noble back to san juan and replacing it by a standard colonist? I don't remember the exact rule about this. Or it could be a bug, of course, that's always a possibility.