I experience the same problem with the WYSIWYG editor. opening the inspector on an admin page where the problem occurs, there’s an error message:
main.js?ver=4.9.8:5 Uncaught TypeError: Cannot read property ‘extend’ of undefined at main.js?ver=4.9.8:5
same issue here!
popup works fine via media library, but not in an ACF options page.
would be great if you could help, your plugin is the best option for manually cropping thumbs!
Thank you,
Ehud
