Howdy Kelly,
I would love to help you with this. It sounds like you are using Google Chrome, and you saw a box underneath the popup message that said “prevent this page from creating additional dialogues”. When you checked this box, Chrome prevents the page from asking you further questions. But this has the side effect of no longer allowing you to edit upcoming.
To fix this, close your tab and then reopen the WP admin edit page. Chrome will forget the setting, and the page will resume working. Does that fix it as expected?
I am sorry for the inconvenience here. That popup is not ideal, and was just a necessarily quick solution to a different problem. We would like to revisit it an improve things so you don’t need a popup if possible.
Cheers!
– Brook