So I just claimed independence on my zolarg colony (region) from my Human colony, to get the Mysticism.
Then I sent an embassy from my Human Colony to the Zolarg one, nothing appears.
I log out then back in the zolarg colony, the Diplomacy icon appears then in the bottom right of the screen and I can build the Human embassy next to my insectoids.
Until then, everything is fine.
When I loaded back the zolarg colony and I see that the embassy disappeared.
Maybe it's a saving problem, I don't know, but now I cannot send another human embassy since it says I already have one there.
I managed to send a zolarg embassy to the Human colony, but I'd like to have both.
So is there any way to rebuild the embassy?
I had the same issue.
Afterward I attempted more embassies and was unable to establish an embassy to or from my Region
From Region:
Select capitol building
Select "Diplomacy"
Select "Establish Embassy" button
Enter valid charter code
Select "Ok"
Select "Select Embassy"
Select any embassy type
Message displayed " Unable to establish embassy."
Windows 7 Home Premium SP1
My Colony Version 0.74.0