Error shown

Hi,

This message appears when I use shipping method filter:

Warning: count(): Parameter must be an array or an object that implements Countable in /home/customer/www/tustecnologiastuc.com/public_html/wp-content/plugins/additional-order-filters-for-woocommerce/additionalorderfilters.php on line 401

Warning: Invalid argument supplied for foreach() in /home/customer/www/tustecnologiastuc.com/public_html/wp-content/plugins/additional-order-filters-for-woocommerce/additionalorderfilters.php on line 402

The page I need help with: [log in to see the link]