Thanks for reaching out to the Community, @HB Hays.
Is this the only Invoice that you've had encountered this behavior? If so, the Invoice may be broken. No worries, there's a simple fix. All you have to do is create a new Invoice for the Customer and delete the current one. This should resolve your issue with the Customer not being able to receive the Invoice. Here's a great resource in case you want to know more about creating Invoice Payment in QuickBooks, you can have this article handy: Create invoices with payment link.
Let me know how this goes for you! I'll be here on standby.
