Major issues with level 6537

Hi @libn, when you get that message have you lost one of the Pets from the top? If a Pet goes then you'll not have enough to win so the level stops even if there are moves left.

Also note that there are limited moves in this level so you need to complete it in 24 moves (they are not unlimited)

Have a look at the example below, I hope it helps?

Can you please post a screenshot of it?
Also, look to see if there is a game update in your app store - sometimes level problems can be because the level has changed slightly and you need to update.