Warning: Attempt to read property "rates" on null in /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce-dhlexpress-services/woocommerce-dhlexpress-services.php on line 218

Fatal error: Uncaught TypeError: sizeof(): Argument #1 ($value) must be of type Countable|array, null given in /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce-dhlexpress-services/woocommerce-dhlexpress-services.php:220
Stack trace:
#0 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-shipping-method.php(233): WC_DHLExpress_Rates->calculate_shipping(Array)
#1 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/class-wc-shipping.php(348): WC_Shipping_Method->get_rates_for_package(Array)
#2 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/class-wc-shipping.php(260): WC_Shipping->calculate_shipping_for_package(Array, 0)
#3 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/class-wc-cart.php(1420): WC_Shipping->calculate_shipping(Array)
#4 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php(339): WC_Cart->calculate_shipping()
#5 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php(850): WC_Cart_Totals->get_shipping_from_cart()
#6 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php(144): WC_Cart_Totals->calculate_shipping_totals()
#7 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php(134): WC_Cart_Totals->calculate()
#8 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/class-wc-cart.php(1398): WC_Cart_Totals->__construct(Object(WC_Cart))
#9 /usr/www/users/rctwdrcxzm/wp-includes/class-wp-hook.php(305): WC_Cart->calculate_totals()
#10 /usr/www/users/rctwdrcxzm/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array)
#11 /usr/www/users/rctwdrcxzm/wp-includes/plugin.php(476): WP_Hook->do_action(Array)
#12 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/class-wc-cart.php(1276): do_action('woocommerce_add...', '97fc9b260a90d9c...', 11484, 1, 0, Array, Array)
#13 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(824): WC_Cart->add_to_cart(11484, 1)
#14 /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(796): WC_Form_Handler::add_to_cart_handler_simple(11484)
#15 /usr/www/users/rctwdrcxzm/wp-includes/class-wp-hook.php(307): WC_Form_Handler::add_to_cart_action('')
#16 /usr/www/users/rctwdrcxzm/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array)
#17 /usr/www/users/rctwdrcxzm/wp-includes/plugin.php(476): WP_Hook->do_action(Array)
#18 /usr/www/users/rctwdrcxzm/wp-settings.php(620): do_action('wp_loaded')
#19 /usr/www/users/rctwdrcxzm/wp-config.php(96): require_once('/usr/www/users/...')
#20 /usr/www/users/rctwdrcxzm/wp-load.php(50): require_once('/usr/www/users/...')
#21 /usr/www/users/rctwdrcxzm/wp-blog-header.php(13): require_once('/usr/www/users/...')
#22 /usr/www/users/rctwdrcxzm/index.php(19): require('/usr/www/users/...')
#23 {main}
  thrown in /usr/www/users/rctwdrcxzm/wp-content/plugins/woocommerce-dhlexpress-services/woocommerce-dhlexpress-services.php on line 220