Fatal error: Uncaught Error: Class "WC_Shipping_Method" not found in /home/successforkids/public_html/wp-content/plugins/usps-woocommerce-shipping/includes/class-wf-shipping-usps.php:8 Stack trace: #0 {main} thrown in /home/successforkids/public_html/wp-content/plugins/usps-woocommerce-shipping/includes/class-wf-shipping-usps.php on line 8