Weird stuff when trying to build Beacon

[Windscion]

Enter city, try to add to or replace build queue with Beacon project.
Instead of expected result, the citizen tile-working graphics out to five hexes in any direction went black. (Which, given that you only work tiles up to three hexes out, was especially strange.) Problem persists on quitting game and restart, load game.
Went to quest/victory panel, verified that it said I was good to go.
Check game cache integrity, no problems -- BuildID 403746.

 

[DaishoChikara]

It did that for me when I was trying to build the Emancipation gate. It's not a bug though. It wants you to choose a tile to build the Beacon in. It's just not very well-documented.

 

[Windscion]

Oh!
Thanks, that helps a lot.