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After update installation error when logging in … pls help

  • After installing the last update 3.5.2. I get the following error

    Fatal error: Call to undefined function is_site_admin() in /home/humanvoi/public_html/tus.gr/tusis/wp-content/plugins/wordpress-related-posts/related-posts.php on line 81

    I can see the whole page and contents like I am a reader, but I cannot do anything as an owner of this site cos I get a blank page with the error above and yes it shows me signed in …

    I hadn’t had an update installed since 2009 …

    Please help me,
    thank you in advanced !!

Viewing 15 replies - 1 through 15 (of 16 total)
Viewing 15 replies - 1 through 15 (of 16 total)
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