Support » Everything else WordPress » Upgrade – Fatal error – “add_thickbox

  • mikehihn


    I got the following fatal error after upgrading to 2.61. The blog seems to display okay, but I can’t get into the admin/dashboard at all.

    It may be because I didn’t understand the instruction to delete all wp files. I did delete all files that begin with wp in the wordpress root directory. Is that enough?

    Fatal error: Call to undefined function: add_thickbox() in /home/content/n/o/t/notjustjokes/html/wordpress/wp-admin/page.php on line 82

    Prior to that I had an an error in wp-settings, and the blog wouldn’t load, so I reinstalled the old file, which got the blog to load but created the error above.

    The error in wp-settings (new file) was

    Fatal error: Call to undefined function: force_ssl_admin() in /home/content/n/o/t/notjustjokes/html/wordpress/wp-settings.php on line 394

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  • mikehihn


    I found the problem. The upgrade instructions that came with the upgrade …. readme.html … suck. I wasted an entire day.

    This is what it says … This is a MAJOR blunder:

    Before you upgrade anything, make sure you have backup copies of any files you may have modified such as index.php.

    Upgrading from any previous WordPress to 2.6.1:
    Delete your old WP files, saving ones you’ve modified.
    Upload the new files.
    Point your browser to /wp-admin/upgrade.php.
    You wanted more, perhaps? That’s it!


    Yeah. A lot more. Cute doesn’t cut it.

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