Warning: main(includes/application_top.php): failed to open stream: No such file or directory in C:\apachefriends\xampp\htdocs\index.php on line 13

Fatal error: main(): Failed opening required 'includes/application_top.php' (include_path='.;c:\apachefriends\xampp\php\pear\') in C:\apachefriends\xampp\htdocs\index.php on line 13