Is this a bug or a rule I am missing

[DarkDexter]

There is only one spot left to place in guildhall. I am maxed out on cathedral track. I have all the resources, apprentices and buildings I need to place last spot. The game will not let me place, it is not an option. Is this a bug in the game or is there a rule i'm missing?

[SJ-the-kiwi]

Sounds like a bug. Please report with a screenshot here: https://boardgamearena.com/bugs

[tinpan70]

Just had the fountain not work for final scoring. Bummer. Have let them know so hopefully can fix.
Great game!

[taqotaqo]

Were you trying to build the crane, that allows you to build an additional building afterwards? I had this happen to me where I wanted to build the crane in the last spot and every time I tried to do it, I would get a big red error message and have to undo my turn. I thought it was some kind of bug, but finally realized the cause. I only had 1 worker left, and the crane required me to place another worker to do my next build, making it an invalid play