Fatal error: Uncaught Error: Class "WP_Upgrader" not found in C:\xampp\htdocs\fruticultura\New folder (2)\agroengtech\wp-admin\includes\class-plugin-upgrader.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\fruticultura\New folder (2)\agroengtech\wp-admin\includes\class-plugin-upgrader.php on line 21