To improve the plugin in vulmers

• fix Woocommerce error on the website about delivery:

Call stack:

wp_die()

wp-content/plugins/woocommerce/includes/admin/settings/class-wc-settings-shipping.php:243

WC_Settings_Shipping->zone_methods_screen()

wp-content/plugins/woocommerce/includes/admin/settings/class-wc-settings-shipping.php:221

WC_Settings_Shipping->output_zones_screen()

wp-content/plugins/woocommerce/includes/admin/settings/class-wc-settings-shipping.php:154

WC_Settings_Shipping->output()

wp-includes/class-wp-hook.php:287

do_action(woocommerce_settings_shipping)

wp-content/plugins/woocommerce/includes/admin/views/html-admin-settings.php:40

WC_Admin_Settings::output()

wp-content/plugins/woocommerce/includes/admin/class-wc-admin-menus.php:271

WC_Admin_Menus->settings_page()

wp-includes/class-wp-hook.php:287

do_action(woocommerce_page_wc-settings)

wp-admin/admin.php:254

That should be the end result: delivery methods of the plugin Shiptor added to the website (displayed in the cart on the left side) and in admin area VP.