Slip de Garcon
Warlord
As posted on the Civ group on Facebook... There is a newly founded Scottish city hidden by the spy menu bottom right. I'm Pachauti.
I sent a spy to reduce loyalty in this upstart city, as it was already teetering on flipping. But my spy appears to have been caught in the act just as the city flipped.
So now my own spy (which the game described as being caught in my capital Qusqu) has been jailed by me and the game suggests I offer me a trade to get it back.
Though - you'll never believe this - the 'offer trade' button doesn't work!