iOS: Invalid registration token. Check the token format

There are two tokens you get at iOS side

1. Token generated by iOS which is received in method didRegisterForRemoteNotificationsWithDeviceToken

2. Token generated by Firebase FIRInstanceID.instanceID().token() (this you can print in AppDelegate)

The issue you are facing is because firebase console portal requires token received by way 2 and you are using token received by way 1.