Push Notifications are not working

[eddyteddy3]

Hi, I am trying to enable the push notifications on iOS but it's not working. I have tried debugging through the "Push Notifications" app and it works fine from there even through from FCM Console on Firebase.

I am using the following method to register the device on channel.
pubnubTemp?.addAPNSDevicesOnChannels([channel], device: token, on: "mybundleID", environment: .production, completion: completion)

However, I have tried listing the registered devices using listAPNSPushChannelRegistrations but that does not seem to work either. Can you help me sort out what is really going on?