For my title, I can't seem to get Push Notifications working, My Title is 35AD, which was an older title before the upgrade to Firebase for Google. I've uploaded my .pem file that works for OneSignal a couple of times now. I can get users registered, but when I try to send a push notification, it fails and then all subsequent pushes say that the client has been unregistered for Push Notifications.
Is there something that got messed up on the upgrade?