Unfortunately that did not solve the problem. Still getting that message. Also now it looks odd on the page because it is listing Donation Amount, then a field with 0 in it, then it has the Paypal button. Shouldn’t it just be the paypal button that opens a separate window? Even if I change the field value to 10, it throws a syntax error message saying it is not well formed.
My website support was also not able to debut this but said: “We could not fully debug this, but it looked like the plugin was sending an incorrect format of the JSON request. “
I have temporarily deactivated this plugin and installed a different one that seems to be working, but hopefully you will get this issue fixed