I'm trying to get PayPal Here to issue a callback to a FileMaker Go database. It looks like the `fmp://` protocol is being used correctly, but seems that there may be some kind of other problem with the callback URL.
Here's the URL that I'm using to call PayPal Here (note that I'm not stripping out the carriage returns from the base64-encoded invoice in my application; this is the actual URL my application sends to the OS, and the invoice appears to be fine in PPH):
This is the URL that I want to fire (this is just for testing; later on, there will be additional parameters added on to send the payment status, etc., but I can't even get this basic version to work yet):
However, the behavior I'm seeing looks like this is the URL PPH is actually sending:
Testing is being done on an iPad 2 running iOS 8.3. Any thoughts/suggestions out there?