Could not fetch the document from PostFinance Checkout. Error 442 connecting to

Hello,

Our customers cannot download the invoice and get this error message:

Could not fetch the document from PostFinance Checkout. Error 442 connecting to the API (https://checkout.postfinance.ch/api/transaction/getInvoiceDocument?spaceId=14191&id=83061811) : {“date”:”2023-01-12T09:22:46.932Z”,”defaultMessage”:”The variable with name ‘documentInvoiceDocumentInformation’ used in the template ‘document/template/payment/invoice.twig’ in line 6 is not defined.”,”id”:”rNV0WulBadSYgO80rpitupqnYQgZlKknvHEPCVfgYjA (2023-01-12T09:22:46.932Z)”,”message”:”The variable with name ‘documentInvoiceDocumentInformation’ used in the template ‘document/template/payment/invoice.twig’ in line 6 is not defined.”,”type”:”CONFIGURATION_ERROR”}

It is also not possible to download the invoice from the WP admin, we get the same error message.

WordPress, Woocommerce and PostFinance Checkout are up to date.

What to do?

Thanks in advance. Kind regards.