They are trying to create a shipping label for an APO address and when they confirm the price, it sits there and does nothing for a while before giving them an error.

Error:

Modules\Fulfillment\Infrastructure\Services\Shipping\Endicia::processImage(): Argument #1 ($url) must be of type string, null given, called in /var/www/html/modules/Fulfillment/Infrastructure/Services/Shipping/ShipLabelBuyer.php on line 301