This is the second mission in the economy tutorial. Your contact at the end of the previous mission asks you to go to ther office in the tavern to explain warehouses. To bring up the Warehouse and lodge, clickon the "Economy" tab or presss(G), then click on the lodge then the item that you are to make, then the "Create it!" button. Wallk out and then talk to them again to finish the Mission.
You can only do one of the follow-up missions.