Warning: require(C:\xampp\htdocs\wordpress/wp-includes/default-constants.php): failed to open stream: No such file or directory in C:\xampp\htdocs\wordpress\wp-settings.php on line 25

Fatal error: require(): Failed opening required 'C:\xampp\htdocs\wordpress/wp-includes/default-constants.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\wordpress\wp-settings.php on line 25