Fatal error: Uncaught Error: Class "WC_Shipping_Method" not found in /home/samipe/public_html/wp-content/plugins/flexible-shipping/src/WPDesk/FS/TableRate/ShippingMethodSingle.php:26 Stack trace: #0 {main} thrown in /home/samipe/public_html/wp-content/plugins/flexible-shipping/src/WPDesk/FS/TableRate/ShippingMethodSingle.php on line 26