Fatal error: Uncaught Error: Class "WP_Import" not found in C:\xampp\htdocs\wp-content\plugins\polylang\integrations\wp-importer\wp-import.php:11 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\polylang\integrations\wp-importer\wp-import.php on line 11