[A Dead Puppie]

@Adders, do you have the Admin usergroup permissions changed so you can view it? A lot of times, you have to manually give yourself permission to view it.

@Delazar, do you have a Dragonbyte Tech product installed, such as "vBCredits II Deluxe" or "vBShop" because I myself get the same error. It's because of this:

It looks like YAAS copied a default vbulletin function out of adminfunctions.php, and vbcredits include adminfunctions instead of doing the same to whatever function(s) it needed.
Including adminfunctions is the correct method here, as it doesn't tie it up and cause problems with other mods (like YAAS is doing

If you don't...sorry. :P hope that clears some stuff...