Notice box in Dashboard with subscribtion form won’t close

A notification box with a subscription form with the title “You have successfully installed Yoast Duplicate Post!” does not close by clicking on the cross. When you go to the page or when you restart, the box appears again.A notification box with a subscription form with the title “You have successfully installed Yoast Duplicate Post!” does not close by clicking on the cross. When you refresh page, the box appears again.