Problem with Google Calendar integration

I've run through all of the steps to integrate Google Calendar with Appointments+ and it doesn't seem to be working. I've got two different appointments setup and tried exporting those with the link in the Google Calendar admin tab, but they won't show up in GCal and when I click to import events, it says there's nothing to import. I noticed that the flow in the Google Developer Console has changed a little bit compared to the instructions, but I was able to create a service account and get all of the information needed. Any help would be greatly appreciated.