The merchant has not given your application sufficient permissions to do that. The merchant must authorize your application for the following scopes: CUSTOMERS_WRITE
It's appearing when clients hit the PAY WITH CREDIT card button on the invoice sent to them via my IRIS online software. On my settings it appears to be linked and communicating with IRIS, but then this appears. Thanks for taking a look at this for me!
Not sure I'm familiar with the set up, @Katieinea. You're able to send a Square Invoice through IRIS? Are your customers receiving our email to complete the payment, or another form of notification?
