I've been trying to set up the fundraising plugin to work with paypal sandbox and in the settings page of the plugin I've got this message:
In order for PayPal simple payments to log properly you must turn on PayPal Instant Payment Notifications and point it to
I have turned the IPN on for my fake business user and pointed it to the URL given to me by the plugin's message.
When I try go make a donation I get this error:
There was a problem connecting with the paypal gateway. (CODE)560022 The X-PAYPAL-APPLICATION-ID header contains an invalid value
What else can I do to make it work?