Fatal error: Uncaught Error: Class "PayPalHttp\IOException" not found in C:\xampp\htdocs\wp-content\plugins\nextgen-gallery-pro\modules\paypal_checkout\vendor\paypal\paypalhttp\lib\PayPalHttp\HttpException.php:5 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\nextgen-gallery-pro\modules\paypal_checkout\vendor\paypal\paypalhttp\lib\PayPalHttp\HttpException.php on line 5