Hi, i'm playing on russian server s4.travian.ru. And I have such a bug in 54 revision. I can build farms, 'cause they are marked with green color. But I'm not allowed to construct infrastructure buildings, such as Main Building or Cranny. They are not green or red based on resource quantity. They are blue as if it is nothing built in this place. And when I click "add" on this "empty" field I have to choose a building to be constructed, as if I clicked on really empty field. Here is screenshot. Is it a bug?