Fatal error: Uncaught Error: Class 'WP_Ajax_Upgrader_Skin' not found in C:\xampp\htdocs\wp-content\plugins\wpforms-lite\src\Lite\Admin\ConnectSkin.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\wpforms-lite\src\Lite\Admin\ConnectSkin.php on line 18