PHP Warning in debug.log

  • Hi

    I have multisite. The plugin is network activated. I have a lot of lines with this error in the debug.log file:

    [16-Oct-2016 13:31:12 UTC] PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, class ‘R3DF_Dashboard_Language_Switcher’ does not have a method ‘on_admin_bar_page_lang’ in /home/lugabglj/public_html/test/bg_wp/wp-includes/plugin.php on line 600

    Thanks for your support
    Niki

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