We're sorry Things don't appear to be working right now
I send my customers a "paypal link" to make a payment for an invoice. This is using the paypal invoices system, so it has nothing to do with any third party website. If the customer pays by credit card (without a paypal account) they get the following error message "We're sorry Things don't appear to be working right now" Used to work perfectly fine for months. Has recently stopped working.