Thanks for becoming part of the Community, sondrad1.
Since your customer's encountering an error message which doesn't allow them to pay their invoice, I'd recommend having them go through some of our recommended troubleshooting.
QuickBooks Payments works best with the following browsers:
I've also included a detailed resource about working with e-invoices which may come in handy moving forward: What to do if customers can't pay their invoices online
Please feel welcome to send a reply if there's any additional questions. Have a lovely day!
That would be a great idea! Adding Intuit as a trusted site prevents the browser from potentially blocking site content.
To add Intuit in Google Chrome, follow these steps:
For Safari, you can refer to this article for the detailed steps: Adding Intuit as a trusted site.
I really appreciate your suggestion. As always, we're always here should you have further concerns about processing payments. We'd be happy to help.