Its simple to fix Menu items opening a 404 Page Not Found error in joomla, just follow the following steps,

  •     Open your configuration.php file and edit the var $live_site = ' '; line to match the actual URL of your website. If your website is http://yourdomain.com for example, the line should look like this:
  •     var $live_site = 'http://www.yourdomain.com ';


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