Add a new page, and enter the {change-history} macro.

Preview before saving the page.

This error is given:

Change history macro can only be used in pages or news.

This is misleading, as the user is correctly adding the macro to pages or news, and it will work correctly on saving. The message should be changed to explain better that the macro cannot be previewed because it is still a draft (similar to the {children} macro message)