Please try resolving that issue as described on the following pages.

https://theme-fusion.com/knowledgebase/are-you-sure-you-want-to-do-this/

http://www.wpbeginner.com/wp-tutorials/how-to-fix-are-you-sure-you-want-to-do-this-error-in-wordpress/

https://premium.wpmudev.org/blog/are-you-sure-you-want-to-do-this-error-wordpress/