It's obviously a glitch. Someone else on the help forum was talking about the same thing happening to them. I suggest writing Neopets about it--doesn't mean you will get compensated for it, but at least it makes them aware that you are upset about yet another glitch hitting you. When the WOK first opened I received an A29 as a prize--it ended up being renamed a brightvale berry, however, it was an actual picture of the berry and not a red X. It seems, in your case, as if Neo released an item into the mainstream before getting all of the bugs out of it.
Ghetto Byrd wrote:
you must of messed around with the url box after winning that is the only way to get that error, by changing the text string in the url bar.
Sorry, but that isn't true at all--I have been the victim of many a glitch on Neopets and none of them were the result of messing around with the url box. Just a matter of being in the wrong place at the wrong time when clicking my mouse.
Tested made this fabulous set for me!!! Isn't it great?