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Home Forums Backend Issues (wp-admin) Uncaught TypeError: Cannot read property 'length' of undefined Reply To: Uncaught TypeError: Cannot read property 'length' of undefined

  • Hi @zartgesotten

    Thanks for the bug report, however, I’m not sure why you are experiencing a core JS error when ACF is activated.

    Have you tried swapping to a default WP theme to make sure the issue does not come from a conflict there?

    Also, can you confirm that all other plugins are disabled when you see this error or are there still a few activated?

    I only ask because this is the first occurrence of this issue, so I believe it will be specific to your install.

    Thanks
    E