React Native Ios Push Notification Not Working

I use '@react-native-firebase/messaging' module to send notifications. On Android everything works fine, Following is the error log I get when I try const fcmToken = await firebase.messaging().getToken(); on ios device.

NativeFirebaseError: [messaging/unknown] The operation couldn’t be completed. (com.firebase.iid error 1001.)

I have already implemented "react-native-permissions" to grant notification permission.

My AppDelegate.m contains :

if ([FIRApp defaultApp] == nil) {
    [FIRApp configure];
 }

Should I add anything else to it? Any help or suggestion will be very helpful. Thanks in advance