PayPal Invoice Payment Option Not Working

At some point the Paypal Payment Option stopped working for invoices on my account.
I made a test invoice this morning and when I clicked on paying with Paypal I get the following screen and message

Can you help? Most of my clients prefer to use PayPal


Hello @FeffS

That message is normally displayed if the software cant link to your PayPal account.

Open Account Settings > All Settings > > Integrations Tab > Online Payment Integrations and select PayPal down the left check the “PayPal Registered Email” is correct.

If you think it is, try an make sure you can log into it (external from QuickFile).