MissingPluginException(No implementation found for method listen on channel plugins.flutter.io/firebase_auth/auth-state/[DEFAULT])

[KevalPrajapati]

I get this error when using Firebase Auth in my app.
What could be causing this error?

Also somehow the Authstatechanges stream doesn't seem to work. It doesn't listen to phone signin or signout.

I tried using this instead of the stream works but gives the error mentioned. (Also I think stream is a better approach)

FirebaseAuth.instance.currentUser != null ? LogIn() : HomePage(),

What could be the reason for that?