I’m having exactly the same problem.
My problem appears on the option page where I have repeater fields.
One for images, one for taxonomies and one for post objects.
I am using:
Advanced Custom Fields Version 4.3.0
Advanced Custom Fields: Options Page Version 1.2.0
Advanced Custom Fields: Repeater Field Version 1.1.0
TinyMCE Advanced Version 3.5.9
WPML CMS Nav Version 1.4
WPML Multilingual CMS Version 2.9.3
WPML String Translation Version 1.9
Strangely I don’t have this problem if I am running the site on my local server but now that I have migrated to my online server, my options page completely crashes.
The problematic line:
var t = wp.media.view.AttachmentCompat.prototype;
(wp is not defined)
Thanks in advance for your help.
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