M2.4.3, v1.0.6: Error when going to the checkout page and login

ISSUE:

I have a problem with the GiftCard extension. When I go to the checkout page and try to log in, I receive an error just after adding the password in the checkout page and Finnish site:

Magento_Ui/js/core/app": Error: Class 'Klarna\Core\Model\Checkout\Orderline\Discount' not found in /var/www/magento2/app/code/Bss/GiftCard/Model/Checkout/Orderline/Giftcard.php:72

SOLUTION:

On Magento 2.4.x, the class Klarna\Core\Model\Checkout\Orderline\Discount has already been removed by Klarna, which caused an unexpected error on your site. 

To temporarily resolve the issue, please edit the file: app/code/Bss/GiftCard/Model/Checkout/Orderline/Giftcard.php as below:

Or download the file attached below to override the current file on your site.

If you need any further assistance, please feel free to contact us. We'd be happy to support you!