English Mastery - Rally the People - Not Working

Quite simply, playing 1v1 Skirmish, I build the King’s Palace and produce 10 villagers from it during Castle Age, as the Mastery requests and then Surrender to end the game. I’ve done it three times now but the Mastery won’t acknowledge it. The Mastery doesn’t specify that it can’t be done in Skirmish, and doesn’t specify I need to win the match.
Bug? Or extra conditions not specified?

Resolved: Turned computer off, back on again and restarted game.


I think I attempted everything as well, I even won the match but the challenge was not successful. What is actually needed to pass this challenge?