I’m having same issue, this message is under code inspector box:
Message: Uncaught TypeError: Object [object Object] has no method ‘dialog’
File: http://piscomistral.noise.cl/wp-content/plugins/sitepress-multilingual-cms/res/js/post-edit.js?ver=3.1.3:104
At least on editing a custom field group.
Adding a new one I’m having the same issue in which I can’t add new layouts too.
EDIT: Sorry, seems this particular error is caused by WPML plugin, not sure if cause ACF Felxible Content addon error.
