Ok, so this has been going on for a while now and I'm pretty sure I can't be the only one facing it. So if I go to the Exchange or Kingdoms page and then click on the 'Farms' link on the side, it brings me to a blank page.
Not the most comforting look and it has been going on for a while... since around the Kingdoms update if i remember correctly. Hope it can be fixed and not sure what's causing it since the URL and everything looks correct.