Enter the trick or treat cause event mut 26 most feared. No key

Yeah, there's something not working right. (There's a shocker!) I used my Grimhollow key to enter the game with the same number as my key. Won the game, but... no rewards! Which means no way to enter a new event game (unless I go buy a key). Is that supposed to be the "trick"? If so, that's the stupidest event I've ever seen in Madden. And that's saying a lot.