Firebase Invalid registration token. Check the tok

This questions has been asked and answered many times before, yet I can't figure out what I am doing wrong. Sending notifications to the whole app from Firebase console works, but if I send to a single token, I get error in firebase console: "Firebase Invalid registration token. Check the token format"

I am testing the app on an Iphone device.

created new key at https://developer.apple.com/account/ios/authkey/ downloaded the p8 file
got the Team ID from https://developer.apple.com/account/#/membership/
uploaded the .p8 file in firebase console under Settings/cloud messaging
in .xcworspace under Targets/Capabilities/Push Notifications : ON
myproject.entitlements file contains APS Environment String development.

NOTE: In developer.apple.com, under APP IDs, if I click on myApp id and scroll down, Push Notifications Configurable & Development show in yellow color and not green.

Xcode version Version 8.3.3 (8E3004b), Swift 3.0
pod file    
pod 'Firebase', '~> 3.9.0'
pod 'Firebase/Auth', '~> 3.9.0'
pod 'Firebase/Database', '~> 3.9.0'
pod 'Firebase/Storage'
pod 'Firebase/Messaging'

Using Firebase (3.9.0)
Using FirebaseAnalytics (3.5.1)
Using FirebaseAuth (3.0.6)
Using FirebaseCore (3.4.4)
Using FirebaseDatabase (3.1.0)
Using FirebaseInstanceID (1.0.9)
Using FirebaseMessaging (1.2.1)
Using FirebaseStorage (1.0.4)
Using GTMSessionFetcher (1.1.12)
Using GoogleInterchangeUtilities (1.2.2)
Using GoogleSymbolUtilities (1.1.2)
Using GoogleToolboxForMac (2.1.3)



import UIKit
import Firebase
import FirebaseCore
import FirebaseMessaging
import FirebaseInstanceID
import UserNotifications

 @UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

 var window: UIWindow?


  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

  FIRApp.configure()

  NotificationCenter.default.addObserver(self, selector: #selector(self.tokenRefreshNotification(notification:)), name: NSNotification.Name.firInstanceIDTokenRefresh, object: nil)

  //obtain the user’s permission to show any kind of notification
  registerForPushNotifications()
  return true
}//end of didFinishLaunchingWithOptions


 //obtain the user’s permission to show any kind of notification
 func registerForPushNotifications() {

  // iOS 10 support
  if #available(iOS 10, *) {
    UNUserNotificationCenter.current().requestAuthorization(options:[.badge, .alert, .sound]){ (granted, error) in
        print("Permission granted: \(granted)")

        guard granted else {return}
        self.getNotificationSettings()
    }
}
    // iOS 9 support
 else if #available(iOS 9, *){UIApplication.shared.registerUserNotificationSettings(UIUserNotificationSettings(types: [.badge, .sound, .alert], categories: nil))
    self.getNotificationSettings()
}
    // iOS 8 support
  else if #available(iOS 8, *) {UIApplication.shared.registerUserNotificationSettings(UIUserNotificationSettings(types: [.badge, .sound, .alert], categories: nil))
    self.getNotificationSettings()
 }
    // iOS 7 support
else {
    UIApplication.shared.registerForRemoteNotifications(matching: [.badge, .sound, .alert])
 }
}//end of registerForPushNotifications()



  //if user decliens permission when we request authorization to show notification
  func getNotificationSettings() {
 UNUserNotificationCenter.current().getNotificationSettings { (settings) in

     print("settings.authorizationStatus is \(settings.authorizationStatus)")
    guard settings.authorizationStatus == .authorized else {return}
    UIApplication.shared.registerForRemoteNotifications()
   }
 }


func tokenRefreshNotification(notification: NSNotification) {
 let refereshToken = FIRInstanceID.instanceID().token()
 print("instance ID token is \(refereshToken)")
 prints: c-_B0W1AKX0:APA91bHBCtFhGtteH1r2y7c8gpUJpfrgDZYtncFmxZQht_wBDWk9Stdf78aMqUctKYU_OlIkmMNW-KLP68_IhdZCM2WxcN4fU1XkoIVNCGTvBogzSpgt4IkveLbK7rNX7pQTfmP72MfV

 connectToFcm()
}


 func connectToFcm() {
   FIRMessaging.messaging().connect { (error) in
      if error != nil  {
         print("unable to connect to FCM")
     }else {
         print("connected to FCM")
     }
   }
 }

}//end of AppDelegate

When I created the app in Firebase console, I mistyped a letter when filling in the Bundle ID.
I never thought about checking it since, I had been using Firebase Database services and all CRUD operations worked as expected, but the Bundle ID in Xcworkspace and BundleID of the firebase app were not exactly the same.
It would be great if anyone from Google could say the reason why reading/writing from the client app worked as expected even though the bundleID was incorrect in Firebase console.

How did I find out the typo?
Initially I uploaded in Firebase console the p8 file which was downloaded from developer.apple.com and no error was shown.
Later on, I decided to use certificates (the old way) and when I tried to upload Apple Push Notification service SSL (Sandbox) - Development I got an error The certificate bundleId did not match that of your app