Hi, iNgenting! Thank you for sharing this review here! I definitely understand that this error message can be frustrating, but please know that this is something we can resolve with some ease! When the game tells you that you do not own the game on the account you're trying to play it with, it means that you are logged into the wrong Ubisoft Account to play this game with. Therefore, please make sure that you are logged into the correct Ubisoft Account to launch the game. If you continue to have this issue, please feel free to create a support ticket[support.ubi.com] so we can better assist you with locating your account! :)