When I attempted to post my finished Twilight of the Arnor tournament game on the Metaverse, I got an error message saying that my "Application serial number" does not match the one on the Metaverse server. I compared the TA serial number on my confirmation email (the number I was using) to my TA serial number on the Accounts section of the Metaverse website and found they were very different. I copied the number on the Metaverse website, opened Stardock Central, went to the games section, right clicked on the Twilight of the Arnor button, and chose "Register Products". In the product dropdown box, I chose "Twilight of the Arnor (Expansion Pack)", and the old serial number contained in the confirmation email appeared in the serial number box. I replaced the old number with the one on the Metaverse website, then clicked "register products". To my surprise, the TA serial number contained on the Metaverse website was ALSO valid. I attempted to resubmit my game, but I received the same error. However, I found I could submit new games created AFTER I had made the serial number change. Repeating this process will allow users affected by the error to submit new games created after the serial number change. Note that you currently cannot change the Twilight of the Arnor serial number on the metaverse through any method. (You can change the Dread Lords serial number, but not the Twilight of the Arnor serial number.) If Stardock made it possible to change your Twilight of the Arnor serial number on the Metaverse, games created before this error was manually corrected by the user could be posted. (By the way, if you have this problem when the normal Metaverse is made available for Twilight of the Arnor, you will not be able to submit normal metaverse games unless you make the change I suggested.)