Steps

1. Create a page.
2. Insert the Page Properties Report macro
3. Add a label
4. Add more than 1 Creator and save the macro
5. Edit the macro

What happened...

The Save button is greyed-out and inactive. There are no creators in the the Creator field. Also the Label field is missing a * indicating that it's required. There is a JavaScript error which is blocking some JS from running.

What should have happened...

The Save button should be blue and clickable. The Creators should be in the Creator field.

Workaround

Create a new Page Properties Report Macro and add the new required Creators. Delete the old macro.