No description on what you need to do to get the prize. it only shows 'some progress - get 2 builders hut' for any of the quests.
It's a known issue, we're hoping to have a fix out soon - the English versions can be found in the spoilered post here: http://forum.plunderpirates.com/index.php?threads/please-help-the-frenchies.4884/#post-36463
