It is possible that an invoice is rejected from the receiving party. Or that your own accounts do not process the e-invoice correctly. To check whether the cause is in the XML (e-invoice), it can be downloaded. If you have any questions about the invoice, the support department can also ask you to download and forward the XML for verification.
You can be in theInbox INandInbox OutOpen the invoice. Or through the appsPurchase invoicesOrSales invoices. You can immediately see the view in pdf that you can also download, but with the following option you can also download the XML: