Yes of course i checked the file is there
If it helps this is the content of the file :
* Jumps to a given relative or Moodle absolute URL.
* Mostly used for accessibility.
*
* @copyright 1999 Martin Dougiamas http://dougiamas.com
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @package course
*/
require('../config.php');
$jump = required_param('jump', PARAM_RAW);
$PAGE->set_url('/course/jumpto.php');
if (!confirm_sesskey()) {
print_error('confirmsesskeybad');
}
if (strpos($jump, '/') === 0 || strpos($jump, $CFG->wwwroot) === 0) {
redirect(new moodle_url($jump));
} else {
print_error('error');
}