dev-client + Android: Unknown error with the FCM server

Please provide the following:

  1. SDK Version: 44
  2. Platforms(Android/iOS/web/all): Android & iOS

I’m using expo-push-sdk:0.1.4 to send push notifications from a Java backend. Locally, I’m using an expo-dev-client rather than Expo Go.

All is good in production and locally on iOS. But when sending to an ExponentPushToken from an Android device running expo-dev-client, I get this error PushTicket:

  "data": {
      "status": "ERROR",
      "id": "37aff728-72e9-4d52-8c05-ac49f8254d28",
      "message": "There was an unknown error with the FCM server. See this error's details for more information.",
      "details": {
         "error": null
  "errors": null

Has anybody seen this before? Any ideas on what it could be?

I use different google-services.json for development and production, but I can’t see anything wrong with the development one.

The code, for what it’s worth:

public void sendMobilePushMessage(MobilePushNotificationDTO message) throws IOException {
    ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();

    List<Message> messages = new ArrayList<>();

    sendMobilePushMessages(message.getTo(), messages);

    executorService.schedule(() -> checkMobilePushReceipts(message.getTo()), 15, TimeUnit.MINUTES);

private Message expoMessage(MobilePushNotificationDTO message) {
    return new Message.Builder()

private void sendMobilePushMessages(String token, List<Message> messages) throws IOException {
        List<List<Message>> chunks = ExpoPushClient.chunkItems(messages);

        for (List<Message> chunk : chunks) {
            try {
                PushTicketResponse response = ExpoPushClient.sendPushNotifications(chunk);
                if (response != null) {

                    List<ExpoError> errors = response.getErrors();
                    if (errors != null) {
                        // Handle errors

                 // Handle individual push ticket errors or save push ticket to db

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