[QUERY]Error Sending FCM v1 Notification: "The notification has no target applications"

[ranusoni1]

I'm using Google Firebase Cloud Messaging (FCM) v1 API to send notifications. I have configured my project with the following details:

Private Key Client Email Project ID

Response : { "message": "Error sending notification: The notification has no target applications. The notification format is gcm. Review the credentials specified in the notification hub description and the notification format.. TrackingId:5da2a253-53eb-4416-9655-80da98ea8a0b,TimeStamp:1/8/2025 8:01:16 AM +00:00" }

I am trying to send a notification to an Android device using the Firebase Cloud Messaging (FCM) v1 API. Despite configuring the private key, client email, and project ID correctly, I receive an error stating, "The notification has no target applications." I want to ensure that the notification reaches any Android device successfully. How can I resolve this issue and make sure the notification is sent to the intended devices?

Tag : firebase-cloud-messaging, azure-notificationhub

Code:
public AzureNotificationService()
{
_hubClient = NotificationHubClient.CreateClientFromConnectionString(NotificationHubConnectionString, NotificationHubName);
}

public async Task<string> SendNotificationsAsync(string title, string body, string deviceToken)
{
    try
    {
        var message = new
        {
            message = new
            {
                token = deviceToken,
                notification = new
                {
                    title = title,
                    body = body
                },
                data = new
                {
                    additionalData = "your-custom-data"
                }
            }
        };

        string jsonMessage = JsonConvert.SerializeObject(message);

        // Send notification using Azure Notification Hub
        var outcome = await _hubClient.SendFcmNativeNotificationAsync(jsonMessage);

        // Check the outcome for success or failure
        if (outcome.State == NotificationOutcomeState.Enqueued)
        {
            return "Notification sent successfully!";
        }
        else
        {
            return $"Notification failed: {outcome.State}";
        }
    }
    catch (Exception ex)
    {
        return $"Error sending notification: {ex.Message}";
    }
}

[Dzivo]

Same for me errors are not really description and the documentation is not very well written i think i am just going with firebase directly