If you are using special characters, accents or umlauts in your pages names osticket will create an error 403.affected file: include/class.format.phpRemove or escape line 683 to 696:    // Thanks, http://stackoverflow.com/a/2955878/1025836    /* static */    function slugify($text) {        // replace non letter or digits by -        $text = preg_replace('~+~u', '-', $text);        // trim        $text = trim($text, '-');        // lowercase        $text = strtolower($text);        return (empty($text)) ? 'n-a' : $text;    }and replace it with:    /* DMT Slugify to support special characters Start */            function slugify($text)    {          // replace non letter or digits by -          $text = preg_replace('~+~u', '-', $text);        // trim          $text = trim($text, '-');        // transliterate          if (function_exists('iconv'))              {            $text = iconv('utf-8', 'us-ascii//TRANSLIT', $text);              }        // lowercase          $text = strtolower($text);        // remove unwanted characters                  $text = preg_replace('~+~', '', $text);        $text = preg_replace('#&()(?|cedil|caron|circ|grave|orn|ring|slash|th|tilde|uml);#', '\1', $text);        $text = preg_replace('#&({2})(?);#', '\1', $text);        $text = preg_replace('#&+;#', '', $text);          if (empty($text))           {            return 'n-a';           }          return $text;    }        /* DMT Slugify Ende */Best regards,Jürgen