error /?wc-ajax=checkout

Hello,
Thanks for the great plugin.
I’m getting an error when placing an order. Could you please check this from your side?

The error was last time triggered by the URL /?wc-ajax=checkout
It seems the cause of the error is the line 117 of the file wp-content/plugins/estimated-delivery-for-woocommerce/estimated-delivery-woocommerce.php.
Here you have the error:

Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, string given in wp-content/plugins/estimated-delivery-for-woocommerce/estimated-delivery-woocommerce.php:117 Stack trace: #0 wp-content/plugins/estimated-delivery-for-woocommerce/estimated-delivery-woocommerce.php(117): count(”) #1 [internal function]: EDWCore->edw_save_custom_order_item_meta_data(Object(WC_Order_Item_Product), ‘4a4ae8ed6f8e360…’, Array, Object(WC_Order)) #2 wp-includes/class-wp-hook.php(310): call_user_func_array(Array, Array) #3 wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters(”, Array) #4 wp-includes/plugin.php(517): WP_Hook->do_action(Array) #5 wp-content/plugins/woocommerce/includes/class-wc-checkout.php(549): do_action(‘woocommerce_che…’, Object(WC_Order_Item_Product), ‘4a4ae8ed6f8e360…’, Array, Object(WC_Order)) #6 wp-content/plugins/woocommerce/includes/class-wc-checkout.php(496): WC_Checkout->create_order_line_items(Object(WC_Order), Object(WC_Cart)) #7 wp-content/plugins/woocommerce/includes/class-wc-checkout.php(439): WC_Checkout->set_data_from_cart(Object(WC_Order)) #8 wp-content/plugins/woocommerce/includes/class-wc-checkout.php(1256): WC_Checkout->create_order(Array) #9 wp-content/plugins/woocommerce/includes/class-wc-ajax.php(508): WC_Checkout->process_checkout() #10 [internal function]: WC_AJAX::checkout(”) #11 wp-includes/class-wp-hook.php(310): call_user_func_array(Array, Array) #12 wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters(”, Array) #13 wp-includes/plugin.php(517): WP_Hook->do_action(Array) #14 wp-content/plugins/woocommerce/includes/class-wc-ajax.php(96): do_action(‘wc_ajax_checkou…’) #15 [internal function]: WC_AJAX::do_wc_ajax(”) #16 wp-includes/class-wp-hook.php(310): call_user_func_array(Array, Array) #17 wp-includes/class-wp-hook.php(334): WP_Hook->apply_filters(NULL, Array) #18 wp-includes/plugin.php(517): WP_Hook->do_action(Array) #19 wp-includes/template-loader.php(13): do_action(‘template_redire…’) #20 wp-blog-header.php(19): require_once(‘/home/l/…’) #21 index.php(17): require(‘/home/l/…’) #22 {main} thrown

Here an extract of the code:

115 if($savedOnOrder != ‘0’) {
116 $date = $this->edw_show_message($values[‘product_id’], true);
117 if(count($date) == 2) {
118 $item->update_meta_data( $date[0], $date[1] );
119 }
120 }