Not compatible with Custom order number plugin.

I am using Sequential Order Numbers for WooCommerce in my site and this DHL plugin does not compatible with it. The error happened in this line

Uncaught Error: Call to a member function get_data() ..../plugins/dhl-ecommerce-apac/includes/shippinglabel/class-dhl-apac-shippinglabel.php:63

Upon checking, it was these codes that caused the error

   $dhl_order              = new WC_Order($post->ID);
   $dhl_order_id           = trim(str_replace('#', '', $dhl_order->get_order_number()));

 $getOrderproductmname   = wc_get_order($dhl_order_id);

The error here is at the $dhl_order_id which is get the order number that changed by the Sequential plugin, hence $getOrderproductmname` will get null.

Apart of that, what I think worth mentioned is, I don’t know why you need get the order data twice, since you already get the order in $dhl_order , why would you want to get the order again in $getOrderproductmname ? This is too redundant, make extra queries to the server. You can just use $dhl_order instead, and since it is using the Post ID, you won’t have to deal with the Order Number.

Since the plugin doesn’t provide any hooks for customization, and I don’t want to change the source file directly, hope you can fix this issue asap.

Thanks.