This happens if the save file was created with the "Deluxe Edition" (which includes the Dragon Armor and Florentine Noble outfits) and you have the Standard Edition. You need to either download a "Standard Edition" save or use a hex editor to remove the DLC flag (advanced users only).
(save location): C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\savegames\[user-id]\31\ assassin 39-s creed brotherhood save game sequence 2
Right-click the folder and copy it to your desktop. If something goes wrong, you can paste it back. Never skip this step. This happens if the save file was created
