Zend certified PHP/Magento developer

Invalid countryId error since update 2.4.3 -> 2.4.4

Since I updated a Magento 2 instance from version 2.4.3 to 2.4.4, I get the error message that the countryId “DE” is invalid when checking out with the payment methods PayPal and credit card payment.
Does anyone have a tip for me where the error comes from and how I can fix it?
Thanks in advance for your help!