Warning: require(C:\xampp\htdocs/wp-includes/user.php): failed to open stream: Invalid argument in C:\xampp\htdocs\wp-settings.php on line 156

Fatal error: require(): Failed opening required 'C:\xampp\htdocs/wp-includes/user.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\wp-settings.php on line 156