No "reward" for completing sticker book in mojang office party

I completed all the stickers in the mojang office party sticker book and I got no reward. The minecraft website says, "After collecting the stickers, your special reward will be automatically granted. You may need to restart to client to see the items." I restarted the client, restarted the game, tried everything. And no "reward". NPC Agnes clearly says, "and don't forget to check your sticker book to see if you complete it for a special reward!" What is this "reward" and why do I not have it? Just look up "minecraft sticker book office party reward" on Google and you'll see a reddit post of people having the same problem. This is just unacceptable.