There is a bug on my queet

Hello i’m new here i want to tell my report. I have finished my daily 28 days quest but i can not opened my chest and i dont get a gold card, please help me…
My id game: careful raticate

HI John, thanks for getting in touch and welcome to our Forum.
I’m sorry to hear about that issue. Could you share more info on why you’re unable to claim the last quest? What happens when you try claim the reward? Have all other 28-day quests been completed successfully?
Thanks for any additional info,