Fatal Error – New Order WC – GSheets

Hi, by following the tutorial, the google sheets set up works fine.

But when I want to create an order in Woocommerce, I am having the following error:

Fatal error: Uncaught Error: Object of class stdClass could not be converted to string in
/wp-content/plugins/advanced-form-integration/includes/functions-adfoin.php:106 Stack trace: #0
/wp-content/plugins/advanced-form-integration/includes/functions-adfoin.php(106): implode(‘,’, Array) #1
/wp-content/plugins/advanced-form-integration/platforms/googlesheets/googlesheets.php(705): adfoin_get_parsed_values(‘{{items_name}}’, Array) #2
/wp-content/plugins/advanced-form-integration/platforms/woocommerce/woocommerce.php(219): adfoin_googlesheets_send_data(Array, Array) #3
/wp-content/plugins/advanced-form-integration/platforms/woocommerce/woocommerce.php(172): adfoin_woocommerce_after_submission(Object(Automattic\WooCommerce\Admin\Overrides\Order))
/wp-content/plugins/advanced-form-integration/includes/functions-adfoin.php on line 106

Can you help me please?

Thanks