Home › Forums › Backend Issues (wp-admin) › Uncaught TypeError: Cannot read property 'length' of undefined › Reply To: Uncaught TypeError: Cannot read property 'length' of undefined
I also migrated to WP3.6 a week ago. Today I had to adjust a slug of a post and I had the the same error. Also I deactivated all plugins and changed theme to Twenty Thirteen. Only when I active ACF and I go to post-types where I have ACF fields the error happens (my test is the slug-edit button and the screen-option tab).
I still testing further, but because I mention to Zartgesotten that only she has the problem I thought I inform you that she is not the only one.
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