Attempt to invoke virtual method com.google.firebase.iid.FirebaseInstanceId.getInstanceId()' on a null object reference

[Kartikay Singh]

Hi all,

I am trying to upgrade firebase-messaging library to the latest version available 17.3.4(earlier version in my project is 11.0.4). But after upgrading to the latest version replacing onRefreshToken() with onNewToken(string). I am not receiving any callback in the onNewToken() method. also i tried fetching the access token on the app launch but it throws the error (as mentioned in the subject)

Here is link to my stack overflow question: https://stackoverflow.com/questions/53692518/attempt-to-invoke-virtual-method-com-google-firebase-iid-firebaseinstanceid-geti  

PS : previous method is working (onRefreshToken())

Stuck on this for 2-3 days now. Any help will be appreciated.

Thanks,

Kartikay