User blog comment:Intrepid potato mine/Piñata Party-a useful and glitchy source of coins and costumes for Plants vs. Zombies 2/@comment-36002582-20180716235144/@comment-35403335-20180723145503

That would explain why it doesn't work. When you read these again can you purposely lose a pinata party and tell me the result?(no, this is not the glitch)

You should have a retry for 1000 coins.