Fatal error using Multisite Plugin Manager plugin

I'm getting this error:

Fatal error: Call to undefined function wp_get_current_user() in /wp-includes/capabilities.php on line 1451

When I activate Portfolio Slideshow plugin, Wanguard, and a couple of other plugins. When I active these other plugins in conjunction with Multisite Plugin Manager I get the white screen of death. The Pro Sites plugin is overkill for my purposes. Suggestions?


  • Ash
    • WordPress Hacker

    Hello there

    I hope you are well today and thanks for asking the question.

    It seems a file is missing in your wordpress folder. Would you please update your wordpress to 3.6.1? If you can't update or it's already updated, then please try to upload wp-admin and wp-includes folder again through your ftp. Also please keep a backup of previous files.

    Please let me know if it is helpful and feel free to ask more question if you have.


Thank NAME, for their help.

Let NAME know exactly why they deserved these points.

Gift a custom amount of points.