Just today, I noticed that when I go to add a new page on my site and select a page template that has Advanced Custom Fields associated with it, it shows the corresponding section on the page but does not do anything when I click on ‘Add Layout Section’.
The screenshot that I’ve attached shows the errors that come up when I click on Add Layout Section. Nothing on the page itself changes, and no layout sections appear.
However, any page on my site that was already created and using these fields, still works. It just appears that I cannot view/create any new ones.
I’ve already ruled out plugin conflicts (disabling one at a time). And there weren’t any other recent changes to the site that I can think of that may be causing this. The errors all point to ACF Pro.