How to display the new mail delivery address in the order email?

Question

PHP

I can't decide what the problem is.

This is how I try to connect a class from a new mail in the module for sending letters.

$delivery_np = Module::getInstanceByName('kldeliverynp');

And this is how I try to output it to a variable.

'{delivery_city_np}' => $delivery_np->getWarehouseByIdCart($order->id),
            '{delivery_warehouse_np}' => $delivery_np->getWarehouseByIdCart($order->id),

Here's what I get.
Fatal error: Uncaught Error: Class 'KlDeliveryNP' not found in C: