So if you’re getting the confirmation popup then you’ve got the field set up with the button and the script is being loaded.
Please post the code for each of these things and I will attempt to look at it and see if there is anything I can see that would be stopping it from working.
1) The function that enqueues the JavaScript
2) The JavaScript function
3) The function that performs the AJAX request along with the add_action() call for it.
