When upgrading to 2.4 or newer from 2.3 or older, you need to add booklets to all the existing editions and edition templates.

Use the EdAdmin script Setup Booklets(), available in Booklets configuration, "File" menu.

It will add the default booklet in each title (where missing) and will update all pages with the default reference (if not already set manually).

You need to confirm each operation in the relative message box (interactive implementation).

You can execute the script several times, if needed.