Warning: require_once(C:\xampp\htdocs\wordpress/wp-includes/plugin.php): failed to open stream: No such file or directory in C:\xampp\htdocs\wordpress\wp-settings.php on line 50

Fatal error: require_once(): Failed opening required 'C:\xampp\htdocs\wordpress/wp-includes/plugin.php' (include_path='\xampp\php\PEAR') in C:\xampp\htdocs\wordpress\wp-settings.php on line 50