newsupernova/vendor/klarna/module-core/etc/adminhtml/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Sales\Block\Adminhtml\Order\View\Info">
        <plugin sortOrder="1" name="klarnaCoreValidationInfo"
                type="Klarna\Core\Plugin\Sales\Block\Adminhtml\Order\View\InfoPlugin"/>
    </type>
    <type name="Magento\Framework\Notification\MessageList">
        <arguments>
            <argument name="messages" xsi:type="array">
                <item name="klarna" xsi:type="string">Klarna\Core\Model\System\Message\Notifications</item>
            </argument>
        </arguments>
    </type>
</config>