Warning: call_user_func_array()

  • Hi,

    Could any one help me, please?

    Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘update_website_url_blue’ not found or invalid function name in E:\Lucky Heritage\Web\xampp\htdocs\wordpress\wp-includes\plugin.php on line 395

    When I add new page… this warning was appear… I’ve added more than one portfolio…

    How to resolve it?

    Thanks!

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