Unable to create the messaging service without a project ID

Question

While sending push notification facing this error, It's working fine in laravel 6 but after upgrade laravel to 8 facing this error.

Unable to create the messaging service without a project ID

Below composer version we used.

"php": "^7.2|^8.0",
"fruitcake/laravel-cors": "^2.0",
"guzzlehttp/guzzle": "^7.0.1",
"laravel-notification-channels/fcm": "2.7.0",
"laravel/framework": "^8.75",

Below code for sending push notification

$fcmNotification = FcmNotification::create()
      ->setTitle($this->notification->title)
      ->setBody(strip_tags($this->notification->message));

$sendData = [
   'action' => 'deep-link',
   'key'    => $this->key,
];

// The FcmMessage contains other options for the notification
return FcmMessage::create()
   ->setCondition(self::PRIORITY_HIGH)
   ->setNotification($fcmNotification)
   >setData($sendData);