I am recieving this error message back from google about a payment that was made and have zero experience with what to do. I have checked the callback url and it is correct, can anyone offer any suggestions? The error in my email reads:
We've made several unsuccessful attempts to send order notifications to your notification callback URL, olympiawebhosting.net/support/whmcs/modules/gateways/callback/googlecheckout.php As a result, you aren't receiving order status, risk, or other notifications.
Thanks,
Donnie